The Edible Garden - $1.99 (90% off)
http://www.amazon.com/The-Edible-Gar...dp/B00EXCOK2K/
I'm putting this here because it is about food, although I don't think it is a cookbook.
*****
Lose Wheat in 4 Weeks - $1.99 (88% off)
http://www.amazon.com/Lose-Wheat-Wee.../dp/B00QGNHU58
Wheat seems to be everybody's punching bag this year!