“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 Maidens 

“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

“Walks the fine line between page-turning thriller and smart sci-fi. Another killer read from Blake.”—ANDY WEIR, #1 New York Times bestselling author of The Martian and Project Hail Mary 

The mind-blowing new thriller from the New York Times bestselling author of Dark Matter and Recursion

“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.