Title: Healthy Brain Book of IQ Puzzles, Author: Fraser Simpson
Title: Math Games for Middle School: Challenges and Skill-Builders for Students at Every Level, Author: Mario Salvadori
Title: Spot-the-Difference Architecture: 40 Brain-Bending Photographic Puzzles, Author: Puzzlewright Press
Title: The Number Devil: A Mathematical Adventure, Author: Hans Magnus Enzensberger
Title: War Games, Author: Jonna Eagle