Then this book is the perfect antidote to sharpen your thinking, improve attention and boost your memory! In the Sudoku Ominibus, you get: • More than 100 sudoku puzzles of varying difficultyevels. • Fourevels of difficulty (easy, medium, hard and nasty). • Solutions at the end of each part. • Sudoku grids which arearge, easy to read and fill out. So get those grey cells working.