Emily, a popular but bookish prep school senior, goes missing after a night out with friends. She was last seen leaving a party with Alex, a football player with a dubious reputation. But no one is talking. Now three mothers, Catherine, Leslie and Morgan, friends turned frenemies, have their lives turned upside down as they are forced to look to their own children—and each other’s—for answers to questions they don’t want to ask.

From Alex Finlay, the author of Every Last Fear and The Night Shift, comes an action-packed new thriller What Have We Done, about the lives we leave behind and the secrets we carry with us forever.

The three Williams girls are as close as sisters can be, and they also share one special trait in common: each of them have a man in their lives that they could do without.

Neighbors Gwen, Aimee, and Lisa share more than playdates and coffee mornings on their tranquil street in East Bethesda. They confide their deepest secrets, navigate the challenges of motherhood together, and provide a support system that seems unbreakable. But when Gwen's husband is found murdered after one of their weekly Friday night dinners, the peaceful quiet of their cul-de-sac shatters. The seemingly idyllic world of the three close-knit mom friends becomes a web of deception, betrayal, and revenge.

When Dr. Sloan Hastings submits her DNA to an online genealogy site for a research assignment, her goal is to better understand the treasure-trove of genetic information contained on ancestry websites. Brilliant and driven, Sloan is embarking on a fellowship in forensic pathology, training under the renowned Dr. Livia Cutty. Sloan has one reservation about involving herself in the experiment: she’s adopted. Grateful for a loving home, she’s never considered tracking down her biological parents.

Rosie Lachlan wants nothing more than to find The One. A year after she was dumped in her wedding dress, she’s working at her parents’ bridal salon, anxious for a happy ending that can’t come soon enough. After receiving a life-saving heart transplant, Rosie knows her health is precious and precarious. She suspects her heart donor is Daphne Thorne, the wife of local celebrity author Morgan Thorne, who she begins messaging via an anonymous service called DonorConnect, ostensibly to learn more about Daphne. But Rosie has a secret.

Stephanie and Jessica have nothing and everything in common. The two women don’t know each other but are on the same plane heading to California. Stephanie is on a business trip and Jasmine is fleeing an abusive relationship. After a few days, they text their friends the same exact messages about the same man—the messages becoming stranger and more erratic. And then the two women vanish. The texts go silent, the red flags go up, and the panic sets in. When Stephanie and Jasmine are each declared missing and in danger, it begs the questions: Who is Trent McCarthy?

There’s something sinister under the surface of Wesley Falls, and it’s not just the abandoned coal mine that lies beneath it. The summer of 1995 kicks off with a party in the mine where six high school students witness a horrifying crime that changes the course of their lives. When they realize that they can’t trust anyone but each other, they begin to investigate what happened on their own. As tensions escalate in town to a breaking point, the six make a vow of silence, bury all their evidence, and promise to never contact each other again. Their plan works—almost.

Brooklyn psychiatrist Dr. Caroline Strange is certain she knows what's best for her patients, her family, and pretty much everyone else, but that all changes when a troubled young man arrives for his appointment and makes a pair of alarming confessions: I am going to kill someone, and I know who you really are. Dr. Caroline is accustomed to hearing her patients’ deepest, darkest secrets, but it seems Nelson Schack may be one step ahead when detectives show up later that day, inquiring about a missing woman.

For the past five years, Ryan Richardson has relived that terrible night. The car door ripping open. The crushing blow to the head. The hands yanking him from the vehicle. His girlfriend Ali’s piercing scream as she is taken. With no trace of Ali or the car, a cloud of suspicion hangs over Ryan. But with no proof and a good lawyer, he’s never charged, though that doesn’t matter to the podcasters and internet trolls. Now, Ryan has changed his last name, and entered law school. He's put his past behind him. Until, on a summer trip abroad to Italy, Ryan gets a call from his father.

Frank Szatowski is shocked when his daughter, Maggie, calls him for the first time in three years. He was convinced that their estrangement would become permanent. He’s even more surprised when she invites him to her upcoming wedding in New Hampshire. Frank is ecstatic, and determined to finally make things right. He arrives to find that the wedding is at a private estate—very secluded, very luxurious, very much out of his league. It seems that Maggie failed to mention that she’s marrying Aidan Gardner, the son of a famous tech billionaire.

On a brisk fall night in a New York apartment, 35-year-old Billie West hears terrified screams. It's her lifelong best friend Cassie Barnwell, one floor above, and she's just realized her infant daughter has gone missing. Billie is shaken as she looks down into her own arms to see the baby, remembering—with a jolt of fear—that she is responsible for the kidnapping that has instantly shattered Cassie’s world.

Every year, the illustrious Van Ness siblings, heirs to a copper fortune, gather at their secluded winery estate for a joint birthday celebration. It's a tradition they've followed nearly all their lives, and now they are back with their significant others for a much-needed weekend of rest and relaxation, away from the public spotlight.

Janie needs a break: her baby won’t sleep, she’s struggling with motherhood, and a secret from her past threatens to tear her new family apart. So when her partner, Max, offers to do their baby’s feedings that night so she can finally get some sleep, she jumps at the chance. But when Janie wakes up at three a.m., her daughter is screaming alone in her bassinet…Max has vanished. Alone with a newborn and desperate for answers, Janie searches for Max, but the more she learns about the man she loves, the more she wonders how well she knew him at all.

Kerry’s life is in shambles: Her husband has left her, her drinking habit has officially become a problem, and though the deadline for her big book deal—the one that was supposed to change everything—is looming, she can’t write a word. When she sees an ad for a caretaker position at a revitalized roadside motel in the Catskills, she jumps at the chance. It's the perfect getaway to finish her book and start fresh. But as she hunkers down in a blizzard, she spots something through the window: a pale arm peeking out from a heap of snow.