Terry Stickels

Math Puzzles & Brainteasers, 6-8

Tough Puzzles For Smart Kids

Go!Games Absolutely Addictive Word Search

Puzzle Workouts: Word Search (Book Six)

Go!Games Crosswords

Math Puzzles And Brainteasers, Grades 3-5

Go!Games The Word Search Challenge

Go!Games Word Search

Mammoth Book Of Brain Teasers

Go!Games Absolutely Addictive Sudoku

Go!Games Sudoku

The Sudoku Challenge

Challenging Math Problems

Usa Weekend: The Big Book Of Frame Games

The Art Of Optical Illusions: Deceptions To Challenge The Eye And The Mind

Le Grand Livre Des Devinettes Et Des Casse-Tête Pour La Salle De Bain - Sudokus, Kakuros Et Devinettes Amusantes Pour Tous Les Jours

Savage Sudoku: 140 Puzzles To Test Your Skills

L'art De L'illusion - Les Effets D'optique Défient L'oeil Et L'esprit

Optische Illusionen