Puzzles for the masters, featuring an array of Gordonian Rectangles.

Swordfish, the Gordonian Polygon, Alternating Digits, and Jellyfish make these sudoku super-hard!

Sudoku is the martial art of puzzles. This book presents a collection of energetic enigmas and numerical conundrums. It is suitable for solvers on the go and for anyone and everyone.

Bring a new skill to the fighting repertoire: interaction.

In his travels to Japan, author Alex Bellos set out to uncover the world's brightest puzzle inventors, puzzle masters, and origami experts so he could bring a new batch of logic puzzles for anyone hankering for something beyond Sudoku. In Puzzle Ninja he presents more than 200 puzzles to solve—rated easy to excruciating—including 20 new types of original, hand-crafted puzzles, like Shakashaka and Marupeke. With clear instructions, helpful tips, and anecdotes about the puzzles and their creators, this is an entertaining read and an exciting collection of the newest, best, and most addictive Japanese logic puzzles.

First came sudoku, and it captivated millions. Then came wordoku, a fabulous letter-based form of the wildly popular puzzle. Now, get ready for a third great variation: wordoku with an added word search surprise! So fans get two puzzles in one, for more fun. Start solving these the same way you would wordoku, by filling in the 9 x 9 grid so the letters don t repeat in any row, column, or box. Then, when you re done, start looking for and circling all the words with four or more letters hidden in the puzzle. Go up, down, and diagonally, but remember: if you haven t completed the grid correctly, you won t find all the words! And be warnedthe puzzles get harder as the book goes along."

Two great brain games come together in one smart package--and the result is a brilliant blend of logical thinking and linguistics. Stupendous SCRABBLE Sudoku--the follow-up to the fantastically successful SCRABBLE-doku--is the inspiration of puzzle powerhouses Frank Longo and Peter Gordon, and they’ve created the highest possible quality puzzling experience. Just fill out each partially completed sudoku puzzle with letters, using each letter only once in every row, column, and boxed-in area. When the puzzle’s done, a legitimate SCRABBLE word will be revealed. It’s a smart way for solvers to stretch their mental muscles...and learn some SCRABBLE vocabulary, too!