Dark Places, by Gillian Flynn.
It was quite the page turner! I made the mistake of starting it last week when I got to St. Louis to visit with Ryan and his family, and this book made me want to be entirely anti-social until I finished it. The main character is Libby, who survived the massacre of her family when she was 7. The book is about her searching for her family's killer...and it is not at all who you'd think it is.
A lot of page turner/mystery/thriller books tend to be poorly written and on the trashy side, with a sleazy sex scene thrown in there for good measure (not all obviously, but many). This book was very well written, and the timeline that the author uses keeps you on your toes.
I highly recommend it, but only if you have a few days free to read it!
What are you reading right now?