Google recently announced that they are making out-of-copyright books available as free PDF downloads via Google Book Search. See this Technorati post for more information. Here are some of the books curently available:
Ferriar’s The Bibliomania
A futurist from 1881’s 1931: A Glance at the Twentieth Century
Hugo’s Marion De Lorme
Dunant’s Eine Erinnerung an Solferino
(information quoted from this Official Google Blog post)
For the complete works of Shakespeare, visit this page from Google.
Several major titles (lke Frankenstein) are not available yet, but the list will be growing all the time. I think back to literature classes I took in college and think of the $200 I spent on Dante, Homer, and other classic authors each quarter. What a great thing this would have been for me, and what a useful thing this will be for students now and in the future (all of these books on your laptop).