Library Thing is too cool! I was able to add titles that I keep in my home to keep up with the collection of books I have. It was very simple. I searched by ISBN to add titles, but one can search by title, author, LCCN, etc. also. Once your titles are added, you can access reviews, see other members that include it in their library, and the tags included for each. This is an excellent resource for teachers to use in their classroom, on a personal basis for your home library, or even for a leveled reader library that is housed separate from a school library catalog.