Before I Go To Sleep: Highly Recommend
Sorry if I'm busting in with a recommendation, but I can't recommend this book enough! I couldn't put down this psychological thriller that does a great job telling the story of a woman who loses her memory every night and has to re-learn everyday... but manages to delve into her past. WAY better than I expected, based on the description, and it will have you on the edge of your seat. Enjoy!