Opculato: Multilanguage Version    by Daniel Mullan
Price: $15.77 USD. 1000 words. Published on March 29, 2011. .
Opculato is the name for the enjoyable arithmetic operator calculation puzzle game that helps improve arithmetic, memory, logic and deduction. Instructions on how to play this puzzle game are in English,Spainish,German,French, Italian,Japanese ,Chinese and Korean.

How To Solve Sudoku - Your Step-By-Step Guide To Solving Sudoku    by HowExpert Press
Price: $9.99 USD. 7130 words. Published on June 4, 2011. .
- Be familiar with the the game rules. - Learn the basic way of doing Sudoku. - Get useful tips in solving Sudoku puzzle. - Be able to solve Sudoku puzzle in the shortest time possible. - Learn how to appropriately choose a candidate. - Solve different levels of Sudoku puzzle. - Amaze your friends and family to your new found hobby of solving sudoku.

Mathematics of Sudoku and Magic Squares    by Charles Kelly
Price: $9.00 USD. 5490 words. Published on October 13, 2011. .
This book will not explain how to solve Sudoku puzzles; it will explain how to create Sudoku puzzles

Sudoku Explained    by Giulio Zambon
Price: $1.99 USD. 11310 words. Published on November 8, 2011. .
This book tells you in a very practical way how to solve Sudoku puzzles.

Puzzles and Mazes 10 - Word, Logic and Math Puzzles    by
Price: $0.99 USD. 150 words. Published on November 10, 2011. .
Entertaining and skill building word, logic and math puzzles suitable both for kids and adults. Fully illustrated. Answers included. Printing not required, all puzzles are intended to be solved mentally.

200 Puzzling Hearts    by Giulio Zambon
Price: $0.99 USD. 1340 words. Published on November 21, 2011. .
Two hundred easy Sudokus that go directly to your heart.

200 Puzzling Shamrocks    by Giulio Zambon
Price: $0.99 USD. 1350 words. Published on November 24, 2011. .
Two hundred difficult to very difficult Sudokus that will try the limits of your abilities.

100 Double CalcuDokus    by Giulio Zambon
Price: $0.99 USD. 1900 words. Published on December 7, 2011. .
If you like difficult Sudokus, you will love Double CalcuDokus. If you want to have fun and train your brain at the same time, CalcuDoku is for you. In this book, you will find exclusively Double CalcuDokus. That is, two CalcuDoku squares that overlap and have to be solved as a single puzzle. This gives an additional twist to the traditional CalcuDokus that makes them even more fun.

Sudoku (9) Logic for Beginners    by Don Harmon
Price: $1.99 USD. 5790 words. Published by Another New Day  on December 18, 2011. .
An informative and logical step-by-step approach to solving Sudoku (9) puzzles.

Symbol Sudoku Puzzles    by Ted Summerfield
Price: $1.99 USD. 410 words. Published on January 6, 2012. .
174 symbol sudoku puzzles from 2 previously published books. 60 pages of puzzles. Electronic, geometric, architectural, and mathematical symbols are just 4 of the 7 different types of symbols used. Printout the puzzles you want to solve, check your solution in your ebook. More challenging than regular sudoku. “I couldn’t put them down”. Convert to PDF if required; see my blog for details.