What If? 10th Anniversary Edition: Serious Scientific Answers to Absurd Hypothetical Questions―An Annotated and Illustrated 10th Anniversary Edition of a Masterpiece of Accessible Scientific Inquiry

1000+ Sudoku Puzzles for Adults: From Medium to Hard with Full Solutions

Absolutely Nasty® Kakuro Level Three (Absolutely Nasty® Series)

300+ Mathematical Pattern Puzzles: Number Pattern Recognition & Reasoning (Improve Your Math Fluency)

Of Course!: The Greatest Collection of Riddles & Brain Teasers For Expanding Your Mind

Logic Grid Puzzles & Other Games: A Fun and Challenging Logic Workbook for Kids 8-12 (Logic Games for Smart Kids)

Sudoku Puzzle Book for Adults: 600 Puzzles – Easy & Medium with Full Solutions

Sudoku Puzzle Book for Adults: 1000+ Easy Level Puzzles with Solutions - Vol 2

100 Hard Extreme Dot To Dot Puzzles Book: Exciting And Mindful Dot-To-Dot For Adults- More Than 90 With Christmas, Sports, People, Vehicles, ... And Relaxation (Extreme Dot To Dot Books)

The Impossible Man: Roger Penrose and the Cost of Genius