The 125 Best Brain Teasers of All Time: A Mind-Blowing Challenge of Math, Logic, and WordplayMarcel Danesi
Brain Teasers for Adults: 75 Large Print Puzzles, Riddles, and Games to Keep You on Your Toes!Marcel Danesi
The Curious History of the Riddle: Solve over 250 Riddles, from the Riddle of the Sphinx to Harry PotterMarcel Danesi
The Total Brain Workout: 450 Puzzles to Sharpen Your Mind, Improve Your Memory & Keep Your Brain FitMarcel Danesi