Are you ready to sharpen your mind to the sharpness of a samurai sword?Sudoku Samurai 9 x 9 x 5, separated by smaller squares of 3 x 3 cells. It is necessary to fill empty cells with numbers from 1 to 9, each of the digits should appear only once in each row of the square 9 x 9, column 9 x 9 and square 3 x 3.- 400 best logical puzzles + bonus in 250 classic Sudoku 9 x 9 very hard levels (bonus puzzles need to be downloaded and printed)The way to mastery of Sudoku! The puzzles will lead you from the light level to the super heavy.- 400 unique Sudoku puzzles- 4 difficulty levels (all difficulty levels)- fitness for your brain- Original Sudoku for the power of your brain- just tested puzzles- answers at the end of the book- all riddles have only one proven solution - good mind support in excellent form - develops memory, logical thinking, helps to focus - creative possibilities expand. Ideal gift for all fans of puzzles. A great book for free time and studying the mind. I hope you enjoy the book. I would really appreciate it if you write a review.Best regards, Basford Holme