This is exactly how i feel all the time! I wander up and down my book shelves looking for something to read.
I just finished MIDDLESEX by Jeffrey Eugenides, this book was powerful but disturbing. The first time i tried to read it i ended up putting it down because some of the themes in the book are disturbing (incest, pedophilia). I do recommend this book if you are not too sensitive to such topics.
Also, i just finished WE NEED TO TALK ABOUT KEVIN. This book was a very slow starter which may turn a lot of people off because the book is fairly long and doesn't really get going till about half way, but if you are reading this book please continue because it all wraps up nicely at the end and it was a really interesting read.