Containing over 130 exciting and carefully constructed puzzles, this series will give you more than your daily fix. This book is compiled with the sudoku addict in mind: each sudoku is graded according to its level of difficulty, from moderate" through tough" to diabolical", giving you the perfect excuse to stay indoors in the warmth this winter. All solvers will find the introductory tutorial an invaluable guide, and solutions are included at the back of the book.