books by subject
Brain Teaser Games
The World's Greatest Book of Useless Information
The IQ Booster: How to Dramatically Improve Your Performance on IQ Tests
Do Cats Have Belly Buttons?: And Answers to 244 Other Questions on the World of Science
Perplexing Lateral Thinking Puzzlers
Mystery Puzzles
CHALLENGING LATERAL THINKING
A Pointless History of the World: Are you a Pointless champion? (Pointless Books)
The I Used to Know That Activity Book: Stuff you forgot from school
I Before E (Except After C): Old-School Ways to Remember Stuff (I Used to Know That ...)
The Classics: All You Need to Know, from Zeus's Throne to the Fall of Rome
A Christmas Cornucopia: The Hidden Stories Behind Our Yuletide Traditions
The New Book of IQ Tests
Mensa Puzzle Book Vol 1: v. 1 (The Mensa Puzzle Book)
Ken Russell Puzzle Challenge
CAN YOU BELIEVE YOUR EYES
Alex's Adventures in Numberland: Dispatches from the Wonderful World of Mathematics
Train Your Brain: 10-minute Su Doku Workout
Games for Thinking (Stories for Thinking)
Devastatingly Difficult IQ Puzzles
Loopy Logic Problems and Other Puzzles (Ivan Moscovich's Mastermind Collection) (Ivan Moscovich's Mastermind Collection S.)
Carol Vorderman's Massive Book of Sudoku
Mathematical Circus
Can Cows Walk Down Stairs?: Perplexing Questions Answered
That Book
Make Your Own 3D Illusions
My Very Very Very Very Very Very Very Silly Book of Jokes: The hilarious new joke book from MATT LUCAS, star of The Great British Bake Off and creator ... an official UK download chart-topping song...
The Ordnance Survey Puzzle Tour of Britain: Take a Puzzle Journey Around Britain From Your Own Home (Puzzle Books)
How Intelligent Are You? The Universal IQ Tests
IQ Puzzles
