Brain Workout: 500 Math and Logic Puzzles in 10 Types for Adults, Seniors & Thinkers With Rules, Examples and Solutions: Test Your Math Skills Using Mathrax, Calcudoku, Kakuro, Futoshiki and More Feline Puzzles, Press
Chronicles of Logic: 40 Story-Based Logic Grid Puzzles for Adults: Brain Teasing Adventures to Solve With Deductive Reasoning, Logic and Skill Brain, Puzzling
Classic Game – Matchstick Math Puzzles: A set of brain teasers to improve your thinking and concentration AG-Arthur, Gwara
Murdle Puzzle Series 4 Books Collection Set By G. T. Karber (Murdle, Murdle: More Killer Puzzles, Murdle: Even More Killer Puzzles & Murdle: The School of Mystery) G. T. Karber