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Impossible Folding Puzzles and Other Mathematical Paradoxes

by Gianni A. Sarcone & Marie-Jo Waeber

Fun-filled, math-based puzzles include Elephants and Castles, Trianglized Kangaroo, Honest Dice and Logic Dice, Mind-reading Powers, and dozens more. Complete solutions explain the mathematical realities behind...


IQ Tester Book

by Charles Phillips

Only people born clever have high IQs, right? Well no, actually. Anybody can make themselves more intelligent. We now know enough about the brain, and the way we think and interact with the world, to guarantee...


Jumble(r) Circus: A Three-Ring Puzzle Extravaganza!

by Tribune Media Services

This collection of Jumble® puzzles—which have been enjoyed by millions of newspaper readers for more than 40 years—features hundreds of mixed-up words coupled with cartoon clues, where one letter from each...


Tangram Teasers Book

by Norbert Pautner

Based on the best-selling Book-in-a-Box kits, the Tangram Teasers book will challenge you to first solve the puzzle by creating the shape shown, but then change it into the new shape in only the set number of...


Puzzles from Penrose the Mathematical Cat

by Theoni Pappas

The famous mathematical cat Penrose takes us on a trip though puzzleland, while sharing fascinating and challenging puzzles in this uniquely designed mini book. Each page's puzzle is introduced by our star Penrose...


The Riddle of Scheherazade: And Other Amazing Puzzles, Ancient and Modern

by Raymond M. Smullyan

In his new book, Raymond Smullyan, grand vizier of the logic puzzle, joins Scheherazade, a charming young woman of “fantastic logical ingenuity,” to give us 1001 hours of brain-teasing fun.

 

Scheherazade,...


To Mock a Mocking Bird

by Raymond M. Smullyan

In this entertaining and challenging new collection of logic puzzles, Raymond Smullyan—author of What Is the Name of This Book? And The Lady or the Tiger?—continues to delight and astonish us with his gift...


101 Amazing Brainteasers: Riddles and Puzzles for All Ages

by Jack Goldstein

Contained within this book are over one hundred fun brainteasers for children and adults alike. Covering subjects including numbers, words, logic problems and lateral thinking they are sure to have you scratching...


Everything Brain Strain Book

by Jake Olefsky

If you're looking for fun ways to challenge yourself for hours, The Everything Brain Strain Book is for you! Over 400 puzzles, riddles, brain teasers, and more will test your IQ and improve your thinking and...


The Everything Lateral Thinking Puzzles Book

by Nikki Katz

If you pride yourself on thinking outside the box, then you'll love The Everything Lateral Thinking Puzzles Book! With hundreds of fun and imaginative problems for avid puzzlers like you, this all-in-one guide...


Ultimate Psychometric Tests: Over 1000 Verbal Numerical Diagrammatic and IQ Practice Tests

by Mike Bryon

Ultimate Psychometric Tests, second edition is the biggest psychometric testing book of its kind. With over 1000 practice questions and an overview of which companies employ which tests, it will help you get...


Ultimate IQ Tests: 1000 Practice Test Questions to Boost Your Brain Power

by Philip Carter & Ken Russell

Ultimate IQ Tests is the biggest book of IQ practice tests available. Written and compiled by IQ-test experts it contains 1000 practice questions organized into 25 tests, with a simple guide to assessing individual...


Sudoku Junior, Volume 4

by YobiTech Consulting

Sudoku Junior Volume 4 EBook contains total of 228 puzzles organized at 5 different difficulty levels (1-5) which includes 2X3, 3X2, 2X4, and 4X2 with all of their solutions respectively. The instruction to...


Sudoku Junior, Volume 5

by YobiTech Consulting

Sudoku Junior Volume 5 EBook contains total of 228 puzzles organized at 5 different difficulty levels (1-5) which includes 2X3, 3X2, 2X4, and 4X2 with all of their solutions respectively. The instruction to...


Sudoku Junior, Volume 3

by YobiTech Consulting

Sudoku Junior Volume 3 EBook contains total of 228 puzzles organized at 5 different difficulty levels (1-5) which includes 2X3, 3X2, 2X4, and 4X2 with all of their solutions respectively. The instruction to...


Sudoku Junior, Volume 2

by YobiTech Consulting

Sudoku Junior Volume 2 EBook contains total of 228 puzzles organized at 5 different difficulty levels (1-5) which includes 2X3, 3X2, 2X4, and 4X2 with all of their solutions respectively. The instruction to...


Sudoku Junior, Volume 1

by YobiTech Consulting

Sudoku Junior Volume 1 EBook contains total of 228 puzzles organized at 5 different difficulty levels (1-5) which includes 2X3, 3X2, 2X4, and 4X2 with all of their solutions respectively. The instruction to...


Sudoku Fiendish, Volume 5

by YobiTech Consulting

Sudoku Fiendish Volume 5 book contains total of 228 very hard puzzles organized at 5 different difficulty levels (1-5) with all of their solutions. The instruction to play both in English and Spanish. This book...


Sudoku Fiendish, Volume 3

by YobiTech Consulting

Sudoku Fiendish Volume 3 book contains total of 228 very hard puzzles organized at 5 different difficulty levels (1-5) with all of their solutions. The instruction to play both in English and Spanish. This book...


Sudoku Fiendish, Volume 1

by YobiTech Consulting

Sudoku Fiendish Volume 1 book contains total of 228 very hard puzzles organized at 5 different difficulty levels (1-5) with all of their solutions. The instruction to play both in English and Spanish. This book...