Witchling
Yasmine Galenorn
The unpleasant profession of Jonathan Hoag
Robert A. Heinlein
Wÿtchs
Jon Bliss
Advanced Linux Programming
Codesourcery Llc & Mark L. Mitchell & Alex Samuel & Jeffrey Oldham
Write Yourself a Scheme in 48 Hours
Wikibooks contributors
Haskell Programming from first principles
Chris Allen & Julie Moronuki