"A twisty, mind-bending thriller that will keep you guessing until the final gut punch." --Leigh Bardugo, #1 New York Times bestselling author of Ninth House, Shadow and Bone, and Six of Crows

"Eric Heisserer's Simultaneous has a mind-blowing premise and razor-sharp execution. Wildly imaginative, emotional, and propulsive--I could not put it down!" --David Koepp, acclaimed screenwriter of Jurassic Park and author of Cold Storage

"Past lives and parallel lives, crime and potential punishment--but the most thrilling thread here is facing belief in a wild theory, a worldview changing, as the theory becomes the most sensible one on the table. Heisserer has outdone himself: a novel with the cinematic stakes and pacing as one of his brilliant scripts." --Josh Malerman, New York Times bestselling author of Bird Box and Incidents Around the House

"Screenwriter Heisserer debuts with this mind-blowing novel that examines assumptions about existence and reincarnation. [. . .]This adrenaline-fueled sci-fi thriller is based on a reincarnation premise that seems eminently plausible and logical. An endlessly interesting book that is impossible to put down." --Library Journal (starred review)

"Simultaneous is a thrilling, fast-paced speculative crime fiction packed with twists, a truly unique premise, and just the right touch of humor. Eric Heisserer's debut novel is bold, mind-bending, and most of all a must-read for fans of the genre."--Capes & Tights

"The twists and turns are wild and completely unpredictable, and the story only gets better as it becomes increasingly complex. Heisserer received an Oscar nomination for screenwriting for the film Arrival, and he delivers the cinematic scope and intensity of a novel-writing pro. And the ending! It's hard to believe this is his first novel, and readers will eagerly want more."--Jeff Ayers, First Clue

"Fast-paced, action-packed, and filled with revelatory ideas, Simultaneous is a quick and enjoyable read that approaches the topics of time travel and reincarnation from a novel perspective."--The Portalist

"Oscar-nominated screenwriter Heisserer debuts with a mind-bending sci-fi thriller.... [The] nuanced characterizations make it easy to buy into his plot, which dazzles with its manipulations of time and its jaw-dropping reveals. This auspicious first outing will excite fans of Blake Crouch."--Publishers Weekly