It’s tough working nights with the NYPD. The crime rate is high, the hours are terrible, and forget about a personal life. So, when Officer O’Reilly and her K-9 Rolf switch over to the day shift, things look up. She’s even able to find time for a new boyfriend. But when the theft of a priceless painting from the Queens Museum leaves a fellow police officer dead, Erin and her four-legged partner find themselves dealing with dangerous criminals, sleazy art dealers, and obstructive detectives in a race to capture the killers...and just maybe bring closure to a 75-year-old crime.

Dive into the world of Maddie Castle, a retired K9 handler turned private investigator, in this heart-pounding collection of the first three novels in the bestselling series. From gripping mysteries to life-threatening pursuits, Maddie and her canine partners battle danger, corruption, and their own pasts to bring justice to those who need it most.

DEA Agent Doug Bridges is angry to realize his stepsister has been kidnapped after her night shift at the hospital. He goes into full agent mode to investigate, but soon runs into dead ends. Winter in northern Wyoming is no joke and he needs help, fast. When he’s referred to the Sullivan K-9 Search and Rescue team, he convinces Maya Sullivan and her Siberian Husky Zion to help him find Emily.

Some horse stables are remote for a reason… Private investigator Nikki Drake thought she was following her vet’s orders by taking her K9 partner to an isolated log cabin deep in the wilds of California. But Gunner doesn’t understand he’s in rehab and his remarkable nose leads to a gruesome discovery. When both the local police and a powerful stable owner brush off her find, she does some digging of her own. Soon she is on the run, with both a terrified groom and a pricey racehorse in tow. The more she learns about the sinister owner, the faster she realizes there is more at stake ...

Caitlyn Reed and her dog, Renegade, are thrown into the midst of murder and intrigue when they discover a dead body while on a trail ride in the black hills of Wyoming. The local sheriff is hell-bent on a conviction, and Caitlyn’s brother, Dylan, is in his crosshairs. Desperate to prove his innocence, Caitlyn turns to Deputy Colt Branson for help, but she must grapple with their rocky romantic past to gain his aid. As Caitlyn and Renegade pursue the killer, the investigation catapults their lives in a dangerous new direction.

The small police force of White Rock, New Hampshire is still reeling from the death of Officer Tyler Richardson when they are called to the scene of the accidental drowning of an out-of-town camper. But Chief Sam Mason and Sergeant Jody Harris soon discover the drowning was no accident. Someone murdered Lynn Palmer and staged the scene to make it look that way. With a pool of suspects who aren't telling the truth and a corrupt mayor who wants the case solved yesterday, Sam and Jo follow a puzzling trail of clues with a surprise ending.

K-9 officer Tarren McGregor never imagined that a cartel would find its way to Texas’s South Padre Island—or target his best friend’s sister. But when Julia Hamilton witnesses and prevents the kidnapping of a teen girl, Tarren knows that trouble is soon to follow. Because Julia didn’t just protect the girl—she saw the abductor’s face. Now she’s marked for murder, and it’s up to Tarren and his K-9 partner to keep Julia safe from the human traffickers in pursuit…even if it means putting themselves in the line of fire.

Meg and Hawk are part of the FBI's elite K-9 unit. Hawk can sniff out bodies anywhere - living or dead - whether it's tracking a criminal or finding a missing person. When a bomb rips apart a government building on the National Mall in Washington, D.C., it takes all of the team's extensive search-and-rescue training to locate and save the workers and visitors buried beneath the rubble.

With the help of her rescue cat, Eddie, librarian Minnie Hamilton is driving a bookmobile based in the resort town of Chilson, Michigan. But she'd better keep both hands on the wheel, because it's going to be a bumpy ride.... Eddie followed Minnie home one day, and now she can't seem to shake the furry little shadow. But in spite of her efforts to contain her new pal, the tabby sneaks out and trails her all the way to the bookmobile on its maiden voyage. Before she knows it, her slinky stowaway becomes her cat co-pilot!

Drones were supposed to make life easier for Jessie and her search and rescue dogs. Instead, they've made everything a lot more complicated. Her equipment confiscated, her very freedom threatened, Jessica Anderson finds herself in the crosshairs of both law enforcement and a vicious killer when her drones discover a body on the slopes of Long Peak.

Former Special Forces operator Sergeant Crew Gatlin takes everything in stride, even the career-ending incident that separated him from the army, half a leg, and his beloved working dog, Havoc K027. Putting his life back together and lying low, he takes a job with A Breed Apart and is unexpectedly reunited with Havoc. It’s too good to be true—and the proof is in their first assignment: to work as a K-9 team for a television drama in Los Angeles.

When a young girl is found dead in the mountains outside Timber Creek, lifelong resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case that has rocked the small Colorado town. With the help of Cole Walker, a local veterinarian and single father, Mattie and Robo must track down the truth before it claims another victim. But the more Mattie investigates, the more she realizes how many secrets her town holds. And the key may be Cole's daughter, who knows more than she's saying.

After their last deployment, when she got shot, her fiancé, Martinez, got killed, and his bomb-sniffing dog, Elvis, got depressed, soldier Mercy Carr and Elvis were both sent home, her late lover’s last words ringing in her ears: “Take care of my partner.” On the Fourth of July weekend, when all of Northshire celebrates with fun and frolic and fireworks, the dog alerts to explosives and they find a squalling baby abandoned near a shallow grave filled with what appear to be human bones.

When her estranged uncle attempts to sabotage her family’s reindeer ranch, K-9 team assistant Katie Kapowski heads home to help save it—and becomes his target. With their rocky past, Alaska State Trooper Brayden Ford and his furry partner are the last team Katie wants assigned to protect her. But with the ranch under siege, they must work together…or risk falling victim to a killer.

While hiking in the foothills of the Rocky Mountains, FBI Special Agent Kendra Dean and her K9 partner, Baxter, stumble upon a dead body stashed in the woods. The discovery changes both of their lives forever. Special Agent Rick Sanchez hunts a serial murderer who is targeting women on a multi-state killing spree. Kendra Dean, an agent Rick met on a joint mission six months ago, has found the most recent victim. Rick and Kendra once shared a tempting chemistry but time and miles made their spark a distant memory.

Eden Mercer, a determined young officer in the fog-shrouded, tight-knit town of Nightfall, Oregon, is haunted by her past in a fundamentalist cult. With her loyal K-9 partner, Shadow, by her side, she’s eager to prove herself in a department dominated by machismo. When a couple stumbles upon a woman’s body in a ritualistic burial deep within the dense, misty forests, Eden is thrust into a chilling mystery. As she delves deeper, disturbing clues and unsettling secrets tied to a local cult emerge.

Caitlyn Reed and her dog, Renegade, are thrown into the midst of murder and intrigue when they discover a dead body while on a trail ride in the black hills of Wyoming. The local sheriff is hell-bent on a conviction, and Caitlyn’s brother, Dylan, is in his crosshairs. Desperate to prove his innocence, Caitlyn turns to Deputy Colt Branson for help, but she must grapple with their rocky romantic past to gain his aid. As Caitlyn and Renegade pursue the killer, the investigation catapults their lives in a dangerous new direction.

This collection includes Chasing Justice, Hunting the Truth, and Killer Secrets.

Dive into the world of Maddie Castle, a retired K9 handler turned private investigator, in this heart-pounding collection of the first three novels in the bestselling series. From gripping mysteries to life-threatening pursuits, Maddie and her canine partners battle danger, corruption, and their own pasts to bring justice to those who need it most.

A head injury as a child gave Haley an extraordinary sense of smell. Her gift allows Haley and her German shepherd, Jax, to be one of the most successful search and rescue teams in the Midwest. When girls begin disappearing with tragic results in her hometown, Haley teams with the county’s new sheriff, Dane Campbell, to find the killer. Haley is drawn to the outgoing sheriff, whose daughter is emotionally damaged. As the murders test Haley’s gift and skills, she learns that sometimes a search and rescue can be about the heart, and the heart can lead the way home.