I buy chess books like an addict in a chocolate shop, the cheapest way to buy them is the electronic version. Generally, I will get a free preview of the book, and for a few dollars, I can get the whole book. I win both ways, if its not for me, it was free anyway. I also get my audio sci-fi books from Amazon too. I have never had a problem with amazon.com and I am happy to recommend them to anyone.