Featuring 400 new puzzles, this is the biggest and best collection of Sudoku ever. Here is the biggest and most varied book of Sudoku puzzles ever compiled. Over 400 painstakingly prepared puzzles designed to satisfy all levels from beginner to expert. "The Mammoth Book of Sudoku" contains more challenges, more levels of difficulty, and more varieties of number-placement (and letter-placement) puzzles than any other collection available, huge array of easy to diabolically-difficult classic grids; monster Sudoku - multiple overlapping grids; secretly encoded alphabetical wordoku; liquid crystal Sudoku; and bonus kakro puzzles. It also contains full step-by-step instructions, tips and killer strategies from the founder of the International High IQ Society and confirmed Sudoku addict, Nathan Haselbauer.
It starts out easy and then it CLOBBERS you! I can't even start the "expert" levels and the monster Sudokus, 4x4 boxes instead of 3x3..wowowowowow those are HARD! But this was a ton of fun. I'll give the rest of it--all the hard ones I can't do--to the Sudoku addict downstairs!