400 KILLER JIGSAW puzzles 9 x 9 MEDIUM - HARD + BONUS 250 LABYRINTH 22 x 22

On the way to the top of skill. It is necessary to fill empty cells with numbers from 1 to 9, each of the digits should appear only once in each row and column of the 9x9 square. The puzzle contains areas in an arbitrary form. The sum of all the numbers in the cage must correspond to the number printed in the corner. They can be called figurative or geometric, they also have names (Killer Jigsaw Sudoku, Killer Geometry Sudoku, Killer Irregular Sudoku, Killer Kikagaku Nanpure). 400 amusing classic puzzles + bonus in 250 Labyrinth 22 x 22 very hard levels (bonus puzzles need to be downloaded and printed). The way to mastery of Sudoku I hope you enjoy the book. I would really appreciate it if you write a review. Best regards, Basford Holmes