Sudoku Fiendish, Volume 5

YobiTech Consulting , Yobitech Consulting

Games & Activities / Logic & Brain Teasers

Sudoku Junior, Volume 4

YobiTech Consulting , Yobitech Consulting

Games & Activities / Logic & Brain Teasers

Massive Book of Mensa® Puzzles

Over 500 Puzzles!—A Colossal Collection to Stimulate Your Brain!

American Mensa , David Millar , Fred Coughlin

Games & Activities / Logic & Brain Teasers

Sudoku Puzzle 25X25, Volume 3

YobiTech Consulting

Games & Activities / Logic & Brain Teasers

LOGIC, SPACE AND TIME

LEARNING CREATIVELY Series. LOGIC-INFORMATICS Area

Fausto Presutti

Games & Activities / Logic & Brain Teasers

55 Smart Apps to Level up Your Brain

Free Apps, Games, and Tools for iPhone, iPad, Google Play, Kindle Fire, Web Browsers, Windows Phone, & Apple Watch

I. C. Robledo

Games & Activities / Logic & Brain Teasers

The Whirl of Words

Puzzling Past and Present

Jonathan Berkowitz

Games & Activities / Logic & Brain Teasers

Sudoku Puzzle, Volume 3

YobiTech Consulting , Yobitech Consulting

Games & Activities / Logic & Brain Teasers

Killer Sudoku Puzzle, Volume 4

YobiTech Consulting

Games & Activities / Logic & Brain Teasers

One-Minute Mysteries and Brain Teasers BONUS Collection

S. A. King

Games & Activities / Logic & Brain Teasers

Sudoku Puzzle, Volume 2

YobiTech Consulting , Yobitech Consulting

Games & Activities / Logic & Brain Teasers

Pocket Posh Sudoku and Beyond 4

100 Puzzles

The Puzzle Society

Games & Activities / Logic & Brain Teasers

Games with Codes and Ciphers

Norvin Pallas

Games & Activities / Logic & Brain Teasers

Sudoku

More Than 200 Tricky Puzzles to Put Your Reasoning to the Test

Gareth Moore

Games & Activities / Logic & Brain Teasers

Sherlock Holmes Compendium of Mysterious Puzzles

Gareth Moore

Games & Activities / Logic & Brain Teasers