From Glenn Cooper, the internationally bestselling author of the Cal Donovan thrillers, comes a technothriller about the end of memory — and the daughter who didn't want hers back.

Baltimore, 2029. Dr. Jamie Abbott helped discover NSF-4, the transcription factor behind the first gene therapy that could treat Alzheimer's disease. He was there when the first dose went into Patient One. He wasn't there two days later, when her grandson flew home from Japan with a fever, walked past an isolation sign, and leaned over her bed.

Two viruses met inside one woman's brain. What came out doesn't kill. It erases — every memory, every face, every year a person has lived — and leaves the body walking around without them. Whole. Curious. New.

An X-ray tech carries it onto a flight to Miami. A cruise ship carries it into the Caribbean. Within months there is almost no one left who remembers how any of it worked.

Jamie's fifteen-year-old daughter Emma looks at him. She has no idea who he is.

The strain that can undo it sits in a freezer at Fort Detrick, and the road there runs through a country where the men who still remember have become the most dangerous thing in it.

Jamie will reach the cure. That was never the hard part.The hard part is Emma, who has decided she likes who she is now.

For readers of Blake Crouch and Michael Crichton — a near-future thriller about the science that saves us and the selves we lose to it.