!4 books- 13 titles. Calvin and Hobbes, The Lazy Sunday Book, The Indispensable Calvin and Hobbes, The Authoritative Calvin and Hobbes, Scientific Progress Goes Boink, Yukon Ho!, Weirdoes From Another Planet, Something Under The Bed is Drooling (2 copies) Revenge of the Babysat, Attack of the Deranged Mutant Killer Monster Snow Goons,There's Treasure Everywhere, It's a Magical World,The Days are Just Packed and the Tenth Anniversary Book.