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.

It’s New Year’s Eve 1999. Y2K is expected to end in chaos: planes falling from the sky, elevators plunging to earth, world markets collapsing. A digital apocalypse. None of that happens. But at a Blockbuster Video in New Jersey, four teenagers working late at the store are attacked. Only one inexplicably survives. Police quickly identify a suspect, the boyfriend of one of the victims, who flees and is never seen again.

After a personal tragedy and professional scandal forces homicide detective Vanessa Castro out of Seattle, she takes a new job in Seaside, Washington, determined to make a fresh start. The small beach town, best known for its popular amusement park, Wonderland, seems like the perfect place to raise her young son and teenage daughter. But it's not that easy starting over, especially as the town's new Deputy Chief of Police. When a dead body turns up at the park her first day on the job, and then a teenage Wonder Worker goes missing, Vanessa's investigation is met with resistance.

A decade ago, two vans filled with high school seniors on a school service trip crashed into a Tennessee ravine—a tragedy that claimed the lives of multiple classmates and teachers. The nine students who managed to escape the river that night were irrevocably changed. A year later, after one of the survivors dies by suicide on the anniversary of the crash, the rest of them make a pact: to come together each year to commemorate that terrible night.

Kit Darling is a maid with a snooping problem. She’s the “invisible girl,” compelled to poke into her wealthy clients’ closely guarded lives. It’s a harmless hobby until Kit sees something she can’t unsee in the home of her brand-new clients: a secret so dark it could destroy the privileged couple expecting their first child. This makes Kit dangerous to the couple. In turn, it makes the couple—who might kill to keep their secret—dangerous to Kit.

In 1977, Claire Lake, Oregon, was shaken by the Lady Killer Murders: Two men, seemingly randomly, were murdered with the same gun, with strange notes left behind. Beth Greer was the perfect suspect - a rich, eccentric 23-year-old woman, seen fleeing one of the crimes. But she was acquitted, and she retreated to the isolation of her mansion.

Years ago, bookseller and mystery aficionado Malcolm Kershaw compiled a list of the genre’s most unsolvable murders, those that are almost impossible to crack - which he titled "Eight Perfect Murders". But no one is more surprised than Mal, now the owner of the Old Devils Bookstore in Boston, when an FBI agent comes knocking on his door one snowy day in February. She’s looking for information about a series of unsolved murders that look eerily similar to the killings on Mal’s old list. And the FBI agent isn’t the only one interested in this bookseller.

Emma Carpenter lives in isolation with her golden retriever Laika, house-sitting an old beachfront home on the rainy Washington coast. Her only human contact is her enigmatic old neighbor, Deek, and (via text) the house’s owner, Jules. One day, she reads a poorly written—but gruesome—horror novel by the author H. G. Kane, and posts a one-star review that drags her into an online argument with none other than the author himself. Soon after, disturbing incidents start to occur at night.

Grace Evans, an overworked New Yorker looking for a total escape from her busy life, books an Airbnb on a ranch in the middle of Wyoming. When she arrives at the idyllic getaway, she’s pleased to find that the owner is a handsome man by the name of Calvin Wells—and he’s eager to introduce her to his easygoing way of life. But there are things Grace discovers that she’s not too pleased about: A lack of cell phone service. A missing woman. And a feeling that something isn’t right with the ranch.

One year ago, Isabelle Drake's life changed forever: her toddler son, Mason, was taken out of his crib in the middle of the night while she and her husband were asleep in the next room. With little evidence and few leads for the police to chase, the case quickly went cold. However, Isabelle cannot rest until Mason is returned to her—literally. Except for the occasional catnap or small blackout where she loses track of time, she hasn’t slept in a year. Isabelle's entire existence now revolves around finding him, but she knows she can’t go on this way forever.

On a flight from London to Boston, Ted Severson meets the stunning and mysterious Lily Kintner. Sharing one too many martinis, the strangers begin to play a game of truth, revealing intimate details about themselves. Ted talks about his marriage that’s going stale and his wife, Miranda, who he’s sure is cheating on him. Ted and his wife were a mismatch from the start - he the rich businessman, she the artistic free spirit - a contrast that once inflamed their passion but has now become a cliché. But their game turns a little darker when Ted jokes that he could kill Miranda....

Twenty-five years ago, Maggie Holt and her parents, Ewan and Jess, moved into Baneberry Hall, a rambling Victorian estate in the Vermont woods. Three weeks later they fled in the dead of night, an ordeal Ewan later recounted in a nonfiction book called House of Horrors. His horror memoir of ghostly happenings and encounters with malevolent spirits became a worldwide phenomenon, rivaling The Amityville Horror in popularity — and skepticism.

Annabel, Esther, Tanya, and Chloe are best friends—or were, as children. Despite drifting apart in adulthood, shared secrets have kept them bonded for better or worse, even as their childhood dreams haven’t quite turned out as they’d hoped. Then one day they receive a wholly unexpected—but not entirely unwelcome—invitation from another old friend. Poppy Greer has invited them all to her extravagant bachelorette party: a first-class plane ticket to three days of white sand, cocktails, and relaxation on a luxe private island in the Bahamas.

Cat Winthorpe has worked hard to get what she has: a gorgeous home; social standing; and William, her successful, handsome husband. Then a friendly new couple moves into the estate next door. While cautious, a good neighbor like Cat greets them with open arms and warm hospitality. Neena Ryder isn’t a fellow lady of leisure. A life coach with off-the-rack dresses, personal issues, and a husband who hasn’t delivered, she’s anxious to move up in the world. This beautiful new town is a step in the right direction. It’s also making Neena aware of what she doesn’t have.

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.