Puzzles

Discover Your IQ Potential: Over 500 Tests of Your Mental Agility

Ball of Confusion

The Great Sherlock Holmes Puzzle Book

Conundrum

Brain Teaser Cryptogram Puzzles

Word Rebus Puzzles

Solve it Like Sherlock

World’s Great Scientific Puzzles Book to Challenge & Solutions: “150 Mixed, Illustrated, All Color”

Cryptogram Puzzle Book New Zealand

Matchstick Puzzles

Maths Tricks to Blow Your Mind

The Canterbury Puzzles, and Other Curious Problems

Big Book of 150 Unique Puzzles & Solutions

Inspector Danger's Crime Quiz

The World of Visual Illusions

Puzzlemaster Deck: 75 Verbal Challenges

Slicing Pizzas, Racing Turtles, and Further Adventures in Applied Mathematics (Princeton Paperbacks)

Classical Enigmas, Adapted to Every Month in the Year

Bletchley Park IQ Puzzles

60 New Trimmed Gift Ideas