Featuring a huge number of Killer Sudoku puzzles, all carefully sorted into order of increasing difficulty, this second unique collection of 200 puzzles is full of attractively-designed challenges from best-selling puzzle author Dr Gareth Moore, author of many international books. Killer Sudoku adds dashed-line cages to regular Sudoku. Each cage must sum to a given value but without repeating a digit. Printed on large, top-quality paper ideal for solving on, the 200 Killer Sudoku puzzles vary in difficulty from moderately easy through to hard. Visit www.PuzzleBooks.org for a full list of other titles in this series.