ManyBooks in one of the first and greatest suppliers of free ebooks online.  If you just got a tablet or an ereader, you definitely need to stop here and check it out.  There are tons of famous books by great authors, as well as those hidden gems.  Check out the Tom Swift books, the collected works of Edgar Rice Burroughs, Charles Dickens, and Tolstoy.

It’s hard to imagine a greater resource than ManyBooks.  You can stop by and in one afternoon create a collection of ebooks that would be the envy of most librarians.  Check it out.