One of the only things I like better than buying books is Free Books!
I recently found a free legal online source for pdf books and comic books.
Wowio.com has a huge selection of books and you can download 3 a day.
They have everything from mysteries to textbooks to comedy to comic books to classics to travel to romance, etc. etc.
Several comic books series well worth downloading: Inverloch, Swords of the Swashbucklers, and The Dreamland Chronicles.
Recent books I downloaded include: Ancient Natural History: Histories of Nature, Soldier and Society in Roman Egypt: A Social History, The Songs of Robert Burns (originally $335.00!), The Early Works of Dr. Seuss - Volume 1, The Early Works of Dr. Seuss - Volume 2, The Land That Time Forgot - Three Book Special Edition by Edgar Rice Burroughs.
If you check out their site and find some book or series you find interesting please leave me a comment!