The Book of Killer Sudoku

Welcome to this superb new selection of 100 killer sudoku puzzles, hand-picked for your solving pleasure. The rules of killer sudoku are very simple, and are outlined below: - Place each number from 1 - 9 exactly once in each row, column and 3x3 bold-lined box that comprise each grid - The grid also contains sets of cells inside dashed lines (called 'cages'). Each of these cages contains a number. This is the sum total of the cells inside the cage. Thus a '4' means that the cells in that cage sum to 4. A number cannot be repeated within a cage.