This title helps you learn how to fill in grids of all shapes and sizes and test parts of the logical mind that have never been tested before! Sudoku fans will love this and will never see normal 9 X 9 puzzles the same way again. The authors are both U.S. Sudoku Champions. Run for cover, because "Mutant Sudoku" is on the loose! Thomas Snyder and Wei-Hwa Huang are both U.S. Sudoku Champions and they'll have readers filling in grids of all shapes and sizes, testing parts of their logical mind that have never been tested before. They will marvel at the ingenuity within these pages and after experiencing the power of these "Mutant Sudoku" puzzles, normal 9 X 9 puzzles will never seem the same again.