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.

No electricity, no family, no connection to the outside world. For eight years, Cooper and his young daughter, Finch, have lived in isolation in a remote cabin in the northern Appalachian woods. And that's exactly the way Cooper wants it, because he's got a lot to hide. Finch has been raised on the books filling the cabin’s shelves and the beautiful but brutal code of life in the wilderness. But she’s starting to push back against the sheltered life Cooper has created for her - and he’s still haunted by the painful truth of what it took to get them there.

One night, Molly Clarke walked away from her life. She doesn't want to be found. Or at least, that's the story. The car abandoned miles from home. The note found at a nearby hotel. The shattered family that couldn’t be put back together. They called it a “walk away.” It happens all the time. Women disappear, desperate to leave their lives behind and start over. But is that what really happened to Molly Clarke?

David Burroughs was once a devoted father to his three-year-old son Matthew, living a dream life just a short drive away from the working-class suburb where he and his wife, Cheryl, first fell in love—until one fateful night when David woke suddenly to discover Matthew had been murdered while David was asleep just down the hall.

Meggie Meyer, an anxiety-ridden debut author, can’t bear to face her upcoming book tour, but she can’t give up on her writing career just as it’s about to really begin. She comes up with a plan that’s so crazy, it just might work: She hires an actress to impersonate her for the two-week stint. Sloan Buchanan, the spunky aspiring actress, jumps at the opportunity to use her intensive acting method to sink into this unusual role, and the line between her and her character quickly begins to blur. And Rachel Drake, the no-nonsense detective, is left to put the pieces together.

Gemma Ballantine is getting ready for work one morning when her eldest child comes running down the stairs saying the words every mother dreads. The front door is open. And her six-year-old daughter has disappeared. Frantic with fear, Gemma starts a nail-biting search for her little girl. After what feels like forever, her mother-in-law, Diane, finds Katie wandering lost a few streets away. Relieved to have her youngest child back in her arms, breathing in the sweet scent of her hair, Gemma thinks the nightmare is over. But then her perfect family starts to fall apart....

The doorbell rings, just days after my beloved husband’s sudden death. I don’t recognise the woman on our doorstep, with her blonde highlights, a diamond bracelet identical to my own and a bouncing baby boy in her arms. As I show her inside, I notice her eyes grow wide as she takes in our spacious hallway, and the big squashy sofas that we all used to pile on. She glances at the silver-framed family photos and my little daughter hiding behind my skirts. She looks at me, her blue eyes serious. ‘I’m sorry’ she says. ‘I am your husband’s girlfriend. And this is his son.'

Zoe didn't meet her daughter the way most mothers do. She finds five-year-old Maddie alone and dirty on a countryside road. Frightened for Maddie's safety, she picks her up and takes her back to her father, not knowing what she's about to step into. Because Maddie wasn't just lost; she was there to lure her serial killer dad's new victim. After escaping from the clutches of Maddie's dangerous father, she bonds with the little girl. Only Maddie knows what it was like to be at that house. And when no family members come forward to claim Maddie, Zoe decides to adopt her.

This innovative, heartfelt debut novel tells the story of a girl who's literally allergic to the outside world. When a new family moves in next door, she begins a complicated romance that challenges everything she's ever known.

Agatha is pregnant and works part time stocking shelves at a grocery store in a ritzy London suburb, counting down the days until her baby is due. As the hours of her shifts creep by in increasing discomfort, the one thing she looks forward to at work is catching a glimpse of Meghan, the effortlessly chic customer whose elegant lifestyle dazzles her. Meghan has it all: two perfect children, a handsome husband, a happy marriage, and a stylish group of friends, and she writes perfectly droll confessional posts on her popular parenting blog.

To five-year-old Jack, Room is the entire world. It is where he was born and grew up; it's where he lives with his Ma as they learn and read and eat and sleep and play. At night, his Ma shuts him safely in the wardrobe, where he is meant to be asleep when Old Nick visits. Room is home to Jack, but to Ma, it is the prison where Old Nick has held her captive for seven years. Through determination, ingenuity, and fierce motherly love, Ma has created a life for Jack. But she knows it's not enough...not for her or for him.

Rachel Jenner is walking in a Bristol park with her eight-year-old son, Ben, when he asks if he can run ahead. It's an ordinary request on an ordinary Sunday afternoon, and Rachel has no reason to worry - until Ben vanishes. Police are called, search parties go out, and Rachel, already insecure after her recent divorce, feels herself coming undone. As hours and then days pass without a sign of Ben, everyone who knew him is called into question, from Rachel's newly married ex-husband to her mother-of-the-year sister.

When Wendy Everly was six-years-old, her mother was convinced she was a monster and tried to kill her. It isn't until 11 years later that Wendy discovers her mother might have been right. With the help of Finn Holmes, Wendy finds herself in a world she never knew existed - a world both beautiful and frightening, and Wendy's not sure she wants to be a part of it.

Ginny Carter was once a rising star in TV news, married to a top anchorman, with a three-year-old son and a full and happy life in Beverly Hills - until her whole world dissolved in a single instant on the freeway two days before Christmas. In the aftermath, she pieces her life back together and tries to find meaning in her existence as a human rights worker in the worst areas around the globe.

When reporter Ellen Gleeson gets a "Have You Seen This Child?" flyer in the mail, she almost throws it away. But something about it makes her look again, and her heart stops—the child in the photo is identical to her adopted son, Will. Her every instinct tells her to deny the similarity between the boys, because she knows her adoption was lawful. But she's a journalist and won't be able to stop thinking about the photo until she figures out the truth. And she can't shake the question: if Will rightfully belongs to someone else, should she keep him or give him up?