S. J. Watson makes his powerful debut with Before I Go to Sleep, a compelling, fast-paced psychological thriller, reminiscent of Shutter Island and Memento, in which an amnesiac who, following a mysterious accident, cannot remember her past or form new memories, desperately tries to uncover the truth about who she is—and who she can trust.
http://www.amazon.com/Before-Go-To-Sleep-Novel/dp/006224454X
Two parts, unabridged