From New York Times and #1 international bestselling author Linwood Barclay comes the third and final spine-chilling thriller in the Promise Falls trilogy. Everything has been leading to this. It's the Saturday of Memorial Day weekend, May 23rd, and the small town of Promise Falls, New York, has found itself in the midst of a full-blown catastrophe. Hundreds of people are going to the hospital with similar symptoms--vomiting, dizziness, loss of consciousness--and dozens are dying. And those investigating the cause of the epidemic quickly zero in on the water supply. But the question for many, including private investigator Cal Weaver, remains: Who would benefit from poisoning this town? And what is their motivation?. Meanwhile, as tragedies mount and the number of suspects grows larger, Detective Barry Duckworth is faced with another problem. He knows that the killer of Olivia Fisher and Rosemary Gaynor is still out there. And what's more, he knows that the mystery behind the significance of the number 23 is growing and is linked to a much larger scheme than he'd originally imagined. Detective Duckworth will have to race to put together all the pieces of this puzzle to stop someone's sinister revenge plot. Review. #1 National Bestseller. "There's definitely something rotten in Promise Falls. In The Twenty-Three, the riveting final installment of the Promise Falls trilogy, the story comes to a frightful and fitting conclusion. Nothing is more satisfying than tucking into a new Linwood Barclay novel, and this is one we've all been waiting for." --Shari Lapena, New York Times bestselling author of The Couple Next Door "Taken together, [the Promise Falls trilogy] is the best thing Linwood Barclay has written and The Twenty-Three is the best book of the bunch. . . . This fast-paced book will keep you reading right to the end, with a twist you won't see coming." --The Globe and Mail "A slam-bang conclusion that will surprise even hard-core thriller readers with the revelations and high body count. . . . Those who have read the previous two novels will be pleased to know that the payoff has been worth the wait." --The Associated Press "The third and final book in Linwood Barclay's ambitious trilogy set in the Upper New York state town of Promise Falls is the most satisfying of the series by a long shot." --Toronto Star. "Barclay is a master of the genre and will keep you up late into the night, torn between savouring every detail and racing to the end." --Canadian Living. "[A] complex flurry of 450 speedy pages. . . . Barclay has created a work whose characters deserve to be followed through all their sorrows, triumphs and blunders to their proper conclusions." --The London Free Press "Bizarre incidents continue to maim and kill the residents of Promise Falls, N.Y., in Barclay's fast and furious conclusion to the trilogy that began with 2015's Broken Promise. . . . Barclay skillfully juggles all the different plot lines right up to the stunning conclusion." --Publishers Weekly. Praise for Linwood Barclay:. ¢ "Where has Linwood Barclay been all my life?" --Stephen King. ¢ "No one can thrill you and chill you better than Linwood Barclay." --Tess Gerritsen. ¢ "Canada's current thriller king." --National Post. ¢ "If you haven't discovered him yet, it's time you did." --The Globe and Mail. ¢ "Linwood Barclay has become the master of the page-turner thriller." --Irish Independent (Ireland) About the Author. LINWOOD BARCLAY is the New York Times and #1 international bestselling author of fourteen critically acclaimed novels, including Broken Promise and Trust Your Eyes, which has been optioned for film.