Will Shortz Presents Ferocious Sudoku: 200 Hard Puzzles

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You can find the book in these categories:

US Books > Entertainment > Puzzles & Games > Puzzles

Product Description：

Are you tough enough? Take on this collection of 200 devilishly difficult sudoku puzzles!

Includes:

-200 hard puzzles

-Perfect portable size

-Big grids for easy solving