I am exploring Google Books
http://books.google.com/
So far I have discovered that I can obtain the full text of many out of copyright books, and a limited text selection of new books. For example, here is a screen shot of my search the the title The Hunger Games.
I am able to read the first 40 pages of the book. As you can see by looking at the arrows to the left that I also have choices of purchasing, or finding a library to borrow the book.
As a librarian, this would be a valuable collection development tool as I could look up titles, and be able to read a chapter or two. My students would be able to enter a search term and find resources to support their research.
I will be doing more exploring of this Google tool!