I'd check out the links on any BDSM site- particularly story posting sites.

Also if it's just stories you want to read, there's one or two posted in the library on this site.

The Story Of O is said to be one of the ultimate journeys into D/s, or slavery- personally it didn't do a thing for me really- it was beautifully written though.

There's a site called www.submissiveloving.com - they used to have some book reviews or something, & that's a good informative site, with little of the nonsense you find in some places.