Raspberry Pi® Projects
Dr. Andrew Robinson
The Cathedral & the Bazaar
Eric S. Raymond
Zones of Control: Perspectives on Wargaming
Pat Harrigan & Matthew G. Kirschenbaum
Learn You a Haskell for Great Good!
Miran Lipovaca
Learning GNU Emacs, 3rd Edition
Debra Cameron, & James Elliott & Marc Loy & Eric S. Raymond & Bill Rosenblatt