Previewing Books Online (Updated)

I think I'm coming a bit late to this party, but I just found out that you can preview books through Google Book Search. Just type in the title of the book you're interested in and you might get partial scans of the text and the cover. This way, you can browse through books whose text might catch your fancy, enticing you to buy the real thing either online or at a brick-and-mortar. In addition, if the story you're looking for is out of copyright or if the publisher has given permission, you might get the whole text! And for works in the public domain, you're free to download a PDF copy!

And while we're on this subject, you can also check out Project Gutenberg, which carries thousands of titles legally downloadable off the web for free, all in the public domain.

Great stuff!

Update: Two more sites that you can check for free and legal downloadable ebooks are Munseys and Manybooks. Thanks to lady5erudite for recommending these sites.