Music Theory 101 (Humble)
Brian Boone & Marc Schonbrun
Day Trading 101 (Humble)
David Borman
World History 101 (Humble)
Tom Head
The Hitchhiker's Guide to the Galaxy
Douglas Adams
2010: Odyssey Two
Arthur C. Clarke
Space Odyssey (2)
2061: Odyssey Three
Space Odyssey (3)
Moonshot
Brian Floca