Kindle best sellers (note there's a paid & free tab, click on free)- http://smile.amazon.com/Best-Sellers-Kindle-Store-eBooks/zgbs/digital-text/154606011/ref=zg_bs_nav_kstore_1_kstore?_encoding=UTF8&tf=1
also, if you click on the various categories on the left, you see more because it's giving...