Ken's Guide to the Bible: All True! Violence! Sex! Absurdity! Weirdness!
My favorite - free online: "The Christ" -- John E. Remsberg
Bank of Wisdom Electronic books are now available for free download
"Fabricating Faith" by Hagenston and "Christ's Ventriloquists" by Zuesse.
Also: "Caesar's Messiah" - Joseph Atwill
If you understand torrents: Google (Criticism of the Bible - Collection torrent)