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Killer Sudoku (also called Sum Sudoku) are a kind of hybrid puzzle that combine the best features of Sudoku and Kakuro (cross-sum) puzzles. Like a regular Sudoku, the rows, columns and 3x3 blocks contain the digits 1 thru 9. In addition, the dotted lines indicate areas, called cages, which also contain a set of non-repeating digits. If you add up the digits in a cage, you get the sum shown in its clue. Happy puzzling! Contains: Glossy premium cover 8.5 x 11 size top quality paper 200 killer sudoku puzzles Solutions at the end of the book Kws: sudoku books, suduko puzzle books, suduko books, soduku puzzle book, sudoku puzzles books