what is the most popular sites for computer books?

Hi.. I believe amazon.com is the top online book store not just for computer but any book. You may try this website also www.webdevelopersjournal.com/books/booklead.html. Hope this helps.

I buy ebooks from ereader.com on a fairly regular basis. If you subscribe to their weekly newsletter emails, each email comes with a discount code you can use on purchases. There are a lot of other good sites out there, but I think the sites that only sells ebooks are a little less expensive on their ebooks than sites that sells both ebooks and hard copies. Most of the ebooks I buy are fantasy or romance.