books by subject
Brain Teaser Games
IQ and Psychometric Tests: Assess Your Personality Aptitude and Intelligence (Testing Series)
Ultimate Psychometric Tests: Over 1000 Verbal Numerical Diagrammatic and IQ Practice Tests
Detox Your Mind
Who Wants To Be a Millionaire? Junior Quiz Book
Spy School: Are You Sharp Enough to be a KGB Agent?
The Big Book of Su Doku
1000 Playthinks
Improve Your Brain Power: 400 Games, Puzzles and Brain Teasers to Unlock Your Mind
Colourful Lateral Thinking Puzzles
New Burlington Books Unsolved Mysteries
The Joy of Mathematics: Discovering mathematics all around you
The Powerscore LSAT Logic Games Bible: 2020 Edition. an Advanced LSAT Prep System for Attacking Any Logic Game, Updated for the Digital Lsat. (Powerscore LSAT Bible)
Elastic Numbers: 108 Puzzles for the Serious Problem Solver
Where's Wally? The Magnificent Mini Book Box: 1
Mindbenders: Brain-Boggling Tricks, Puzzles & Illusions (Dk General Reference)
Brain Games Lower Your Brain Age in Minutes A Day
Bletchley Park Brainteasers: The biggest selling quiz book of 2017
Word Play: A cornucopia of puns, anagrams and other contortions and curiosities of the English language
The World Cup Of Everything: Bringing the fun home
Grandad's Book Of Sudoku: 200 traditional sudoku puzzles in easy, medium and hard
101 Bets You Will Always Win: The Science of the Seemingly Impossible
Brain Training Puzzles For Kids: 100 of the best brain teasers with over 50 puzzle types
Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love (Books for Smart Kids)
Examinate: A Doctor Who Quiz Book
Optical Illusions: The Science of Visual Perception (Illusion Works)
What's the Story?
Patterns of the Universe: A Coloring Adventure in Math and Beauty
The Ultimate Brain Health Puzzle Book for Adults: Crosswords, Sudoku, Cryptograms, Word Searches, and More!
The Kids’ Book of Christmas Wordsearches (Buster Puzzle Books)
