Train the Brain: Use It or Lose It

How to Solve It: A New Aspect of Mathematical Method

Naomiki Sato's Origami Roses: Create Lifelike Roses and Other Blossoms

Sherlock Holmes Case-book of Curious Puzzles: A Collection of Enigmas to Puzzle even the Greatest Detective

The Amazing Sherlock Holmes Puzzle Book: A Cornucopia of Conundrums Inspired by the World's Greatest Detective

How to Solve a Rubik's Cube: The Easy Solution to The Rubik's Cube, A Beginner's Guide to Solving This Puzzle, Quick and Easily! (3x3 Cube) (Rubix) (2nd Edition)

Brain Workout: Tips and Techniques to Train your Mind

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

Tutankhamun and the Puzzles of Ancient Egypt

Brain Training And Brain Games for Memory Improvement: Concentration and Memory Improvement Strategies with Mind Mapping: Concentration and Memory Improvement Strategies with Mind Mapping

Leonardo da Vinci Puzzles: Creative Challenges Inspired by the Master of the Renaissance

An Illustrated Book of Bad Arguments: Learn the Lost Art of Making Sense (Bad Arguments)

Lateral Logic: Puzzle Your Way to Smart Thinking

My Best Mathematical and Logic Puzzles

Einstein Puzzles: Brain Stretching Challenges Inspired by the Scientific Genius

How to Make Origami Airplanes That Fly

Sherlock Holmes Compendium of Mysterious Puzzles

Cracking Codes and Cryptograms For Dummies

Edgar Allan Poe Puzzles: Puzzles of Mystery and Imagination

Fast Math: Learn the Secrets of Mental Math: By Using Vedic Math and Other Math Tricks to Perform Mental Calculations from Multiplication to Percentages without Calculators