A person without long-term memory. It is familiar at least from Memento and 50 first dates. [a:S.J. Watson|4470653|S.J. Watson|http://d.gr-assets.com/authors/1306131065p2/4470653.jpg] does not add a technical twist to this foundation, but shows that a technical twist is not the only way to make a novel engaging and satisfying. He writes an emotional roller coaster. The memory loss is not a way for him to meditate about human memories but a way to construct an excellent drama.