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 Patien