I've been using this great book database for several years - nothing else comes near it!
You can store books in many formats - PDF, Doc, eBooks etc.
I use it to store User Guides for all my appliances and software. It is so easy to add items and to read and search them. If you have a library of printed books you can add data via the ISBN and so much more.
For a full list of super features check out the site:
http://www.bolidesoft.com/allmybooks.html
Enjoy!
