Copper Falls, Montana

Riley MarshK-9 Search & Rescue Mysteries

“Everybody believes lost. Riley Marsh doesn’t.”

A paramedic who came home. A chocolate Lab who works for a battered orange duck. And a mountain town that keeps agreeing not to see things.

Book 1 No Trail Back — Riley Marsh K-9 Search & Rescue Mystery, Book 1, by Mara Perry
The Washout — the free prequel novella

Free prequel novella

The Washout

Before Copper Falls.
Before the duck.
Before they were a team.

Riley Marsh has spent nine years being useful. Wilderness paramedic, ground-team leader, the one who reads the mountain when nobody else can. What she doesn't have anymore is a dog.

When a retired schoolteacher goes missing above a small Cascades town in the first cold rain of October, Riley stands at a trail junction at one in the morning and works out exactly where the woman is, and exactly why no one will believe her. Command draws the search circle from a neighbor's statement. The circle is wrong. Riley has no way to prove it.

Two weeks later, at a guide-dog school's career-change day in Oregon, a fourteen-month-old chocolate Lab ignores every person in the yard, works the fence line nose-down, and brings her a wool glove she didn't know she'd dropped. His file says excessive environmental sniffing. His puppy raiser, who is twelve and certain he failed, hands her a chewed orange canvas duck and makes her promise it stays with the dog.

She names him Huckleberry.

The Washout is the story of Riley and Huck's first winter: the runaways in the rain, the alert nobody taught him, a camera under five months of moss, and the small human lie sitting six hours upstream of a woman who should have lived. It ends the morning a boy goes missing ahead of a thunderstorm, and a dog who isn't certified yet has to be right the first time.

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Not available anywhere else. It’s also the only place you’ll ever find out where the duck came from.

The Series

A search that turns into a case

Riley Marsh spent eleven years as a wilderness paramedic learning that the cold kills people the cliffs and the bears never got around to. Now she’s back in Copper Falls, Montana, the town she left and the mountains that took her brother, running the county’s K-9 search-and-rescue unit with Huck, a seventy-pound chocolate Lab who works on a single word and gets paid in a battered orange duck.

Riley pays him for the truth. Even when the truth is nothing here. Especially then.

A complete case

Every book is a full, fair-play mystery, start to finish. No cliffhangers holding the ending hostage.

Real scent work

Trailing, air scent, and article search on the page — a working dog doing an actual job, explained as it happens.

Nothing graphic

The crime is off-page. The aftermath is the story. Warm, wry, and never gratuitous.

The dog comes home

Huck is never seriously harmed. Not in this book. Not in any of them. That’s a promise.

Running underneath all of it: Danny. Nineteen years old, on a trail crew, walked into the backcountry twelve years ago and never came out. Riley was on the base-camp radio the night the search was scaled back. She read the order aloud herself. She has believed ever since that her own voice ended it. And the longer she stays in Copper Falls, the less she believes the simple story the town tells about that night.

For fans of Margaret Mizushima’s Timber Creek novels, David Rosenfelt, and Nevada Barr.

Reading Order

The Books

Ten novels and a free prequel. Each one stands alone — but they’re better in order.

FREE The Washout
Free novellaPrequel

The Washout

Before Copper Falls.
Before the duck.
Before they were a team.

Riley Marsh has spent nine years being useful. Wilderness paramedic, ground-team leader, the one who reads the mountain when nobody else can. What she doesn't have anymore is a dog.

Read the full description

When a retired schoolteacher goes missing above a small Cascades town in the first cold rain of October, Riley stands at a trail junction at one in the morning and works out exactly where the woman is, and exactly why no one will believe her. Command draws the search circle from a neighbor's statement. The circle is wrong. Riley has no way to prove it.

Two weeks later, at a guide-dog school's career-change day in Oregon, a fourteen-month-old chocolate Lab ignores every person in the yard, works the fence line nose-down, and brings her a wool glove she didn't know she'd dropped. His file says excessive environmental sniffing. His puppy raiser, who is twelve and certain he failed, hands her a chewed orange canvas duck and makes her promise it stays with the dog.

She names him Huckleberry.

The Washout is the story of Riley and Huck's first winter: the runaways in the rain, the alert nobody taught him, a camera under five months of moss, and the small human lie sitting six hours upstream of a woman who should have lived. It ends the morning a boy goes missing ahead of a thunderstorm, and a dog who isn't certified yet has to be right the first time.

It's also the only place you'll ever find out where the duck came from.

A complete 30,000-word prequel novella to the Riley Marsh K-9 Search & Rescue Mysteries. Free, and not available anywhere else.

2 The Hard Freeze
Available nowWinter

The Hard Freeze

A chinook thaw.
A hard freeze.
And a death the whole town blames on the weather.

When a warm February wind hits the Montana mountains, search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, pull a half-frozen rider out of a creek alive. Two nights later the county turns to glass, and Riley's radio goes off for the same trail.

Read the full description

This time it's Emmett Pruett, a local man, found dead on the slope above his wrecked snowmobile.

The county calls it an accident. Bad ice, bad luck, a rider off a groomed trail on the worst night of the winter.

Riley Marsh disagrees.

A man who freezes to death melts himself a bed in the snow. Emmett is lying on top of it. And nobody in Copper Falls pays cash for a twenty-thousand-dollar snowmobile, but Emmett did.

Six months home, in a town still sore about the last thing she found, Riley won't let it go, and Sheriff Simon Brennan quietly keeps the file open. But a hunch won't change a ruling. She needs proof, so she takes the dog back up the mountain.

Up there, Huck finds enough to keep her asking. And in a place this small, asking questions about one neighbor means asking questions about everyone. The town isn't afraid she's wrong. It's afraid she's right.

Meanwhile, the file on her brother's search has been sitting unopened on her kitchen table since November. This winter, she runs out of reasons not to open it.

3 One Page Missing
Pre-order nowSpring

One Page Missing

A missing outdoors star.
A trail every clue says he took.
A search dog pulling the other way.

Releases October 20, 2026

Nearly a year after coming home to Copper Falls, Riley Marsh has built a life she still refuses to call permanent. She runs the county’s K-9 search-and-rescue unit with Huck, her seventy-pound chocolate Lab, has a standing Tuesday coffee with Sheriff Simon Brennan, and spends her days off searching the mountains for the brother who disappeared twelve years ago.

Read the full description

Then Jordan Pike, an outdoors star followed by millions online, heads into the mountains alone and doesn’t come back.

Everything points to Tamarack Lakes: his post, the missing page from his atlas, the trail register.

Everything except Huck.

When Huck finally leads her to Jordan, the coroner calls his death an accident. A fall from a rock high above the valley, exactly the kind of place Jordan made his name standing too close to the edge.

Riley Marsh disagrees.

Jordan’s camera is missing. So is his phone. And when Huck follows another scent away from the place Jordan fell, it leads down the back of the mountain to a road nobody should have been using.

Somebody else was up there.

To prove it, Riley will have to get past a stranger from Ohio with a long lens and a lie about where he was, a video the whole internet has already watched, and one person who knew Jordan well enough to make millions of strangers believe the wrong story.

Meanwhile, another missing page is waiting for Riley in Copper Falls.

This one disappeared twelve years ago, during the search for her brother.

  • A complete standalone mystery, with Riley’s long-running search for her brother continuing underneath
  • Real K-9 search work: scent articles, trailing, article search, and a dog who keeps telling the truth
  • A missing outdoors star, a mountain full of conflicting evidence, and a search sent the wrong way
  • The slow-burn sheriff and a standing Tuesday coffee at the Copper Kettle
  • A small Montana town suddenly watched by millions
  • No graphic on-page violence. The crime is off-page; the aftermath is the story.
  • The dog always comes home.
4 The Last Encore
Pre-order nowSummer

The Last Encore

A country singer, gone before her encore.
The town says Nashville.
The search dog says the river.

Releases November 10, 2026

In the hottest August Copper Falls has ever known, twelve thousand people pour into the valley's first music festival. Search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, are there to see every one of them home.

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Then the headliner, Nicky Brand, the valley's own star, walks off before her last song. She leaves her phone on her trailer floor, and as the crowds drive away, Riley and Huck follow her trail into the dark.

All night they search the airless river bottoms. At first light Huck finds her on a gravel bar three miles downriver, barely conscious but alive. Three days later she is dead, and the doctors blame the heat.

Riley Marsh disagrees.

Riley held Nicky in the river at dawn, hours after sunset, and she was still burning up with a fever the cold water couldn't touch. Nobody else was there to feel it.

With Sheriff Simon Brennan quietly keeping the file open, Riley takes Huck back over Nicky's long night, and the trail tells a different story from the one the town believes. But who in her own hometown would want Nicky Brand dead?

And in the fort she and her brother built as kids, Riley finds something he hid the year he vanished. Every page is in his handwriting. She can't read a word of it.

5 The Final Grid
Pre-order nowAutumn

The Final Grid

Every night, the woman in the fire tower radios in.
One night, she doesn't.
Her dog is still inside. She isn't.

Releases December 1, 2026

Search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, climb to the tower on its remote peak to check on Lorna Haas, who watches for wildfires there all summer. They find only her little dog, shaking at the window.

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For four days, as the first snow closes in, every team in the valley searches and finds nothing. When the people in charge want to call it off, Riley keeps going with Huck, until he sits and stares: the signal for the dead.

Riley braces for the worst, but the bones they dig up are old, in freshly turned earth, and not Lorna's.

The next day Lorna is found alive and says she got lost in the storm. The county calls it two sad accidents: hers, and an old hiker's.

Riley Marsh disagrees.

No woman walks into a storm and leaves her dog behind. She's sure Lorna didn't get lost at all: she ran, terrified of someone, and whoever it was is still out there. With Sheriff Simon Brennan beside her, Riley has to find them before they find Lorna again.

She is determined to give the bones a name and bring them home to rest. But one question keeps her awake: her brother vanished in these mountains thirteen years ago. Are they his?

At Lorna's window, Riley sees the mountains exactly as her brother once drew them. For thirteen years she has searched for a boy who got lost. What if he never was?

6 The Winter Guest
Pre-order nowWinter

The Winter Guest

One guest at the only B&B in town.
Paid in advance, no car, no story.
On the ninth morning, he doesn't come down to breakfast.

Releases December 22, 2026

When his room is found empty, search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, go out into twelve below after him. They find him before dark, a mile off the road, in the snow.

Read the full description

The county calls it a wandering-off. A stranger, unwell, in deep cold. Sad, and ordinary.

Riley Marsh disagrees.

A man who walks the same road for eight straight mornings isn't wandering. He's waiting for something on it. And a man who arrives with no story is usually carrying one.

A year and a half home, Riley works it with Sheriff Simon Brennan, and the stranger doesn't stay a stranger for long. Somebody in Copper Falls knew why he came. In a town this small, that means someone Riley has known her whole life has been keeping a secret for years.

And in the lining of a suitcase nobody will claim, she finds something that belongs to her own story, and has no business being there.

7 The Giving Ground
Pre-order nowSpring

The Giving Ground

The only road out is under forty feet of mountain.
The state lab is on the other side of it.
And somebody inside the valley is already dead.

Releases January 12, 2027

The slope above the pass comes down on a Tuesday night in April and takes the valley's only road with it. The county says four days until it's open. Until then, Copper Falls has 2,847 people, one sheriff, no coroner, and search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, working the debris in the dark for anyone caught under it.

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The county calls it an accident, the kind that happens when a town is cut off, scared, and doing too much at once.

Riley Marsh disagrees.

Panic makes people careless. Whoever did this was careful.

Nearly two years home, Riley knows a fixed suspect pool when she's standing in one. There's no lab, no coroner, and no help coming up the road, so for four days she and Sheriff Simon Brennan are the whole investigation. Whoever did this is still in the valley, and so is everyone who could prove it.

And then the man who taught Riley to read ground when she was sixteen stops answering his phone. When he finally opens his door, it isn't to talk about the slide.

It's the conversation she's wanted since the day she came home. She isn't ready for it.

8 The Last Toast
Pre-order nowSummer

The Last Toast

A hundred and forty wedding guests.
Eleven minutes when every one of them was looking the same way.
And an officiant who never made it to the toasts.

Releases February 2, 2027

The lodge up the valley does four weddings a summer, and this is the biggest: a hometown bride, a groom from Missoula, and half the county in the receiving line. Search-and-rescue handler Riley Marsh is there off duty, in a dress, with her chocolate Lab, Huck, under the table and a new puppy at home who has already eaten one boot.

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The county calls it a cardiac event. The family flies him home. The lodge books its next wedding.

Riley Marsh disagrees.

A hundred and forty alibis is too many. When everyone is watching the same thing, nobody is watching anyone. And a man who marries strangers for a living learns things about them.

Two years home, Riley knows what a room looks like when it has agreed on a story. She and Sheriff Simon Brennan have a guest list, eleven minutes, and a lodge full of people who would rather remember the vows. Half the county was at that wedding, and every question she asks lands on a family she's known her whole life, on the happiest day of somebody's year.

Meanwhile, the question Riley has carried since the day she came home finally has a name for an answer.

It's a name she has known her whole life.

9 The Unsent Letter
Pre-order nowAutumn

The Unsent Letter

The case collapses in forty minutes.
The one witness who could save it dies four days later.
And then a letter turns up that was never meant to be read.

Releases February 23, 2027

Search-and-rescue handler Riley Marsh and her chocolate Lab, Huck, gray at the muzzle now, have spent two years being right. This October, being right stops being enough. The arrest Copper Falls argued about all summer comes apart at a pretrial hearing over a chain-of-custody question, in front of a courtroom that half empties out relieved.

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The county calls it natural causes.

Riley Marsh disagrees.

Four days before a deposition isn't a coincidence. It's a deadline.

This time, she's nearly alone. Half the town thinks she cost the county a good man's name, and the other half won't say what it thinks in public. Sheriff Simon Brennan is taking professional damage for standing beside her, and the rival who once filed a complaint against her is burning his own standing to keep her in the field.

Then the county's dispatcher of forty-one years brings a shoebox to the barn, full of things she's kept since 2014.

And in a box of papers from a house sale two counties north is an envelope with Riley's name on it. It was never mailed. Whoever wrote it knew exactly where to find her.

10 The Long Way Home
Pre-order nowWinter → Spring

The Long Way Home

Fourteen years.
Ten searches.
One trail left, and it doesn't end where anyone looked.

Releases March 16, 2027

Search-and-rescue handler Riley Marsh has spent her whole adult life learning to find people. She has one left. Everything she's gathered in two and a half years fits on the seat of her truck: a jacket, a notebook, a photograph, a letter. None of it is a case. All of it is a map.

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The county says it's over. Copper Falls has a spring to get on with.

Riley Marsh disagrees.

A search isn't over when somebody calls it. It's over when you know.

So Riley runs the last search the way she's run every other one: grid it, work it, believe the dog. Her chocolate Lab, Huck, is retired now, gray to the eyebrows, and comes anyway, because nobody has ever successfully told him not to. Lucy takes the lead. Sheriff Simon Brennan, engaged to Riley since the fall, drives.

The trail goes north, out of the county, past the last place anyone looked.

To a cabin at the end of a road, and a door Riley has been walking toward for fourteen years.

The Team

Riley & Huck

Riley Marsh

Riley Marsh

K-9 Handler · Twelve years a paramedic

She came home to run the county’s search-and-rescue unit. That’s true. It isn’t why. Riley reads bodies the way a medic does — cold, competent, and unwilling to sign off on a story that doesn’t fit the ground it happened on.

Her lease is six months. Her boxes are still packed. Twelve years ago she was the voice on the base-camp radio that read the order to scale back the search for her nineteen-year-old brother, and she has believed ever since that her own voice ended it.

Huckleberry, a chocolate Labrador search-and-rescue dog

Huckleberry

Chocolate Lab · Seventy pounds · Guide-school washout

All shoulders and purpose. He failed out of a guide-dog program for what his file called excessive environmental sniffing — which turned out to be the whole job description of the career he was actually built for.

He works on a single word and gets paid in a battered orange canvas duck that a twelve-year-old made Riley promise would stay with him. She pays him for the truth, even when the truth is nothing here. Especially then.

Sheriff Simon Brennan

Simon Brennan

Sheriff · Copper Falls County

By the book, unhurried, and not remotely interested in letting a civilian run his investigation. He takes his hat off for the dead. He wants something better than a feeling — which is a problem, because feelings are usually all Riley has until the dog proves her right.

He also keeps turning up at the Copper Kettle on Tuesdays. He calls it a debrief. Mari, who owns the diner, calls it something else.

Mari Ortega, owner of the Copper Kettle diner

Mari Ortega

Owner · The Copper Kettle

Riley’s oldest friend and the reason she has anywhere to sit down in this town. Mari runs the diner, knows every callout before dispatch finishes reading it out, and brings pie to the table without being asked.

She is the closest thing Copper Falls has to a public record — and the only person who tells Riley the truth about herself.

Mara Perry at home in Washington State with her two rescue dogs
Mara Perry

About the Author

Mara Perry

Mara Perry writes mysteries about working dogs and the people who trust them.

She grew up in the Northwest, where she learned two things early: the cold gets more people than the cliffs ever do, and a good dog will tell you the truth whether or not you want to hear it. Both turned out to be useful to a novelist.

The Riley Marsh K-9 Search & Rescue Mysteries are her first series. They follow a former wilderness paramedic and a chocolate Lab who washed out of guide-dog school, working searches in a small Montana county where what the dog says and what the official report says keep failing to line up. The books are written for readers who want a mystery without the gore, the profanity, or the bedroom door left open, and for anyone who has ever wondered what a search dog is actually doing when he lifts his nose into the wind.

The search-and-rescue craft in the books comes from handlers who were generous with their time and patient with her questions. Any mistakes in it are hers.

She lives in Washington State with her husband, two sons, and two rescue dogs, neither of whom has ever been asked to find anything harder than a dropped sandwich.

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