Title: Kenken: Lim-ops, No-ops And Twist!: 180 6 X 6 Puzzles That Make You Smarter, Author: Robert Fuhrer
Title: Kenken: A Puzzle A Day!: 365 Puzzles That Make You Smarter, Author: Robert Fuhrer
Title: The Game of Logic, Author: Lewis Carroll
Title: Amusements in Mathematics, Author: Henry Ernest Dudeney
Title: Increase Your Puzzle IQ: Tips and Tricks for Building Your Logic Power, Author: Marcel Danesi