Become a master in solving Killer Sudoku. You will experience Killer Sudoku 9x9, Killer Sudoku 10x10 and Killer Sudoku 12x12. You get the perfect mix of different sizes of Killer Sudoku to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Killer Sudoku Pro. You start with easy Killer Sudoku puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard Killer Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! The goal of Killer Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. The sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. Killer Sudoku Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Killer Sudoku puzzles per grid size, totaling 72 easy puzzles 24 medium Killer Sudoku puzzles per grid size, totaling 72 medium puzzles 24 hard Killer Sudoku puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Killer Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.