Nathan Haselbauer Books
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60-Second Brain Teasers Pencil-Free Puzzles - Nathan Haselbauer

60-Second Brain Teasers Pencil-Free Puzzles

Nathan Haselbauer

At your home, on the commuter train, or in your doctor's office—whenever you have a minute or two, challenge your brain with these ingenious brainteasers!

Mammoth Book of Codeword Puzzles - Nathan Haselbauer

Mammoth Book of Codeword Puzzles

Nathan Haselbauer

The mammoth book of codeword puzzles is a truly bumper collection of these hugely popular puzzles - also known as codewords, cipher crosswords and cipher word puzzles.

The Mammoth Book Of Codeword Puzzles - Nathan Haselbauer

The Mammoth Book Of Codeword Puzzles

Nathan Haselbauer

Word puzzles, cipher crosswords, whatever you call them, codewords are hugely popular for stimulating the brain!

The Mammoth Book Of New Iq Puzzles - Nathan Haselbauer

The Mammoth Book Of New Iq Puzzles

Nathan Haselbauer

Nathan haselbauer, president of the international high iq society, has painstakingly researched and designed this impressively varied collection of over 500 mind-bending puzzles to enable you to determine just how clever you are.

The Mammoth Book Of New Iq Puzzles - Nathan Haselbauer

The Mammoth Book Of New Iq Puzzles

Nathan Haselbauer

The variety of math, logic, and word puzzles range from reasonably straightforward to fiendishly difficult in this comprehensive collection.

Test your IQ - Nathan Haselbauer

Test your IQ

Nathan Haselbauer

Everything Test Your I.Q. Book - Nathan Haselbauer

Everything Test Your I.Q. Book

Nathan Haselbauer

Do you have a unique ability to solve patterns and riddles?

The Mammoth Book of Kakuro, Wordoku, and Super Sudoku - Nathan Haselbauer

The Mammoth Book of Kakuro, Wordoku, and Super Sudoku

Nathan Haselbauer

Everyone is waking up to a whole new world of puzzles from japan.

Everything Test Your I. Q. Book - Nathan Haselbauer

Everything Test Your I. Q. Book

Nathan Haselbauer

Do you have a unique ability to solve patterns and riddles?

The Mammoth Book of Sudoku - Nathan Haselbauer

The Mammoth Book of Sudoku

Nathan Haselbauer

Here's the biggest and most exciting book of sudoku puzzles ever compiled.

Everything test your IQ book - Nathan Haselbauer

Everything test your IQ book

Nathan Haselbauer

Do you have a unique ability to solve patterns and riddles?

The Mammoth Book of Sudoku - Nathan Haselbauer

The Mammoth Book of Sudoku

Nathan Haselbauer

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The Mammoth Book of IQ Puzzles - Nathan Haselbauer

The Mammoth Book of IQ Puzzles

Nathan Haselbauer

This brilliant new puzzle collection from the creators of the hugely successful the mammoth book of puzzles and the mammoth book of astounding puzzles features a cumulative iq scoring system based on the new haselbauer-dickheiser test for exceptional inte.

What's your IQ? - Nathan Haselbauer

What's your IQ?

Nathan Haselbauer

Little book of bathroom brainteasers - Nathan Haselbauer

Little book of bathroom brainteasers

Nathan Haselbauer

Over 200 no-pencil-required brain teasers that take two minutes or less!

The little book of bedside brainteasers - Nathan Haselbauer

The little book of bedside brainteasers

Nathan Haselbauer

The little book of bedside brainteasers head-scratching puzzlers for every day.