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