I've been picking up more and more pdfs from DriveThruRPG. This is a roughly 30 Mb file that has been well bookmarked. They not only sorted the spell book marks by level, but even bookmared each spell! Quite happy with this purchase, and it has made referencing my wizard's spells a breeze. Should also mention the file has text recognition so you can search for terms if you are not sure where to find an obscure rule.
[5 of 5 Stars!]