NEW YORK TIMES BESTSELLER * "If Michael Crichton had written a superhero novel, it would look a lot like Upgrade."-The New York Times Book Review

"You don't so much sympathize with the main character as live inside his skin."-DIANA GABALDON, #1 New York Times bestselling author of the Outlander series

"Mysterious, fascinating, and deeply moving-exploring the very nature of what it means to be human."-ALEX MICHAELIDES, #1 New York Times bestselling author of The Silent Patient and The Maiden

ONE OF THE BEST BOOKS OF THE YEAR: Time, She Reads

The mind-blowing new thriller from the New York Times bestselling author of Dark Matter and Recursion-currently in development as a motion picture at Steven Spielberg's Amblin Partners

"You are the next step in human evolution."

At first, Logan Ramsay isn't sure if anything's different. He just feels a little . . . sharper. Better able to concentrate. Better at multitasking. Reading a bit faster, memorizing better, needing less sleep.

But before long, he can't deny it: Something's happening to his brain. To his body. He's starting to see the world, and those around him-even those he loves most-in whole new ways.

The truth is, Logan's genome has been hacked. And there's a reason he's been targeted for this upgrade. A reason that goes back decades to the darkest part of his past, and a horrific family legacy.

Worse still, what's happening to him is just the first step in a much larger plan, one that will inflict the same changes on humanity at large-at a terrifying cost.

Because of his new abilities, Logan's the one person in the world capable of stopping what's been set in motion. But to have a chance at winning this war, he'll have to become something other than himself. Maybe even something other than human.

And even as he's fighting, he can't help wondering: what if humanity's only hope for a future really does lie in engineering our own evolution?

Intimate in scale yet epic in scope, Upgrade is an intricately plotted, lightning-fast tale that charts one man's thrilling transformation, even as it asks us to ponder the limits of our humanity-and our boundless potential.