Simultaneous, Eric Heisserer
Simultaneous, Eric Heisserer
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Simultaneous
A Novel

Author: Eric Heisserer

Narrator: Marin Ireland, Ray Porter, Stephanie Sheh

Unabridged: 7 hr 53 min

Format: Digital Audiobook Download

Published: 10/28/2025


Synopsis

2026 Audie Awards winner for Best Science Fiction!

"The three narrators' performances are so exquisitely skilled that this audiobook is irresistible...Ray Porter fully embraces the gruff, no-nonsense investigator, who's skeptical about therapy and time travel. Marin Ireland, as the therapist, and Stephanie Sheh, as the patient, are both immediately credible." — Kirkus

“A twisty, mind-bending thriller that will keep you guessing until the final gut punch.” —Leigh Bardugo

“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.” —Josh Malerman, New York Times bestselling author of Bird Box

From the Oscar-nominated screenwriter of Arrival comes a phenomenal speculative thriller about a federal agent and a therapist who team up to stop an otherworldly killer. This program features multicast narration.

Federal agent Grant Lukather works for an unknown department of Homeland Security called Predictive Analytics. They look for patterns in tips and chatter to prevent a terrorist event before it happens. One of these calls, about a possible explosion in New Mexico, leads Grant to a case with unimaginable consequences.

He meets Sarah Newcomb, a therapist who uses past-life hypnosis in her treatment but has recently stumbled upon a phenomenon that seems to defy logic. Grant follows this thread to another crime: a copycat killer case in Colorado. With the help of one of Sarah’s patients, they embark upon an investigation that spans multiple states, timelines, and consciousnesses. With limited time and only a tenuous grasp of how this phenomenon works, the unlikely trio are in a race for their lives—past, present, and future.

Full of thrilling reveals, stunning plot twists, and a mordant sense of humor, Simultaneous is a mind-bending, one-of-a-kind thriller by a true genre star.

A Macmillan Audio production from Flatiron Books

About Eric Heisserer

Eric Heisserer is the Academy Award-nominated screenwriter of Arrival (2016) and the creator of the Netflix series Shadow & Bone. He lives in Los Angeles.

About Ray Porter

Ray Porter is a prolific voice actor that has recorded for over 100 audio books and dozens of television series, video games and video shorts.  Among his wide variety of audiobook credits are The Silver Linings Playbook, The Black Hole War, and the Joe Ledger series. He claims, “With every book I’ve done, I have found that the author has a voice and if I can just do my best to stay out of the way of that voice, then the writer will convey what he’s trying to put across. So for me, it’s really more about enabling the text and what the author is trying to say.”


Reviews

Goodreads review by Sofia on May 21, 2025

Grant is a Homeland Security agent in the department of Predictive Analytics, which investigates projections of terrorism to stop attacks before they happen. Sarah is a past-life therapist who accesses her patients’ previous incarnations to help them heal. Marigold is a patient whose “past” body act......more

Goodreads review by Angie on May 26, 2025

WOW- I was intrigued from the first page until the ending. Imagine that there are only so many available souls and recent history has increased the population so substantially that the should cannot keep up. Therefore one soul occupies multiple bodies...simultaneously....hence the title. So this is......more

Goodreads review by Melli on May 21, 2025

I recieved a copy of this ARC and am leaving this review voluntarily. This is my first book with Eric Heisserer and I'm very surprised how good this book was! It took your typical serial killer case and put a shocking and interesting twist on it. It incorporated themes of cult like killers that use......more

Goodreads review by Justin on July 30, 2025

Oscar-nominated screenwriter Eric Heisserer delivers a powerful debut with Simultaneous, a fantastic speculative thriller. With its mind-bending concept, this novel had me hooked from the start and didn't let go until the very last page. Federal agent Grant Lukather works for an unknown departmen......more

Goodreads review by Red Book Review on June 09, 2025

Simultaneous is a speculative thriller that will have you hooked from the beginning. I could not stop turning the pages. This is about a federal agent and a therapist that team up to make a stop to an otherwordly killer. The book kept me guessing until the end and every twist in this was great. This......more


Quotes

“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


Awards

  • Amazon.com Best Books of the Year