Restart by Gordon Korman (Very good, 2017, Pbk, 243 pages, Scholastic)

In very good condition: cover and pages have light wear; pages are unmarked. ISBN 9781338246032

Chase's memory just went out the window.

Chase doesn't remember falling off the roof. He doesn't remember hitting his head. He doesn't, in fact, remember anything. He wakes up in a hospital room and suddenly has to learn his whole life all over again...starting with his own name.

He knows he's Chase. But who is Chase? When he gets back to school, he sees that different kids have very different reactions to his return. Some kids treat him like a hero. Some kids are clearly afraid of him.