Containing standard puzzles and killer puzzles, the new Daily Telegraph sudoku collection is the perfectly accompanied by a cup of tea and a biscuit. The book is compiled with both addicts and novices in mind: each sudoku is graded according to its level of difficulty, from 'gentle' through 'moderate' and 'tough' to 'diabolical'. All solvers will find the introductory tutorial an invaluable guide, and solutions are included at the back of the book.