Sometimes, it's just hard to know what book to buy, I've found that certain bestseller's lists don't reflect the actual quality of the books listed but instead the power of the publishing house behind it. So, instead I go here to find new and interesting books to read:

http://www.booksense.com/bestsellers/index.jsp
http://eyeonbooks.com/mostlistenedto_more.php

Have any good ones I missed?