Of course you all knew that raging feminist that I am, it would have to be Amazon http://www.amazon.com ! I love it because they always say "Hello Donna" when I check in. They always show me my "Wish List" . When I buy a book they show me others that I would like as well. They treat me as though I am family. Well, maybe not quite, they don't send me cards for holidays or my birthday. But, I have never received a book in a condition other than it was described; in fact, even the ones that I have purchased that were listed as in not so good shape, were in much better shape than I had anticipated. The shipping is very quick and since I'm so darned OCD about not wanting to pay S&H charges, I always buy the amount needed to get free S&H.