Samurai Sudoku Puzzle Book For Adults

Now updated from customer feedback. Puzzles are now harder.
Samurai Sudoku Puzzle Book For Adults is a collection of 500 sudoku puzzles overlapping into 100 samurai style puzzles. This book is designed to help keep your brain cognitively fit, flexible, and young. Samurai Sudoku is a partial overlapping arrangement of five standard Sudokus. Samurai Sudoku Puzzle Book For Adults is packed with the following features: Answers to every puzzle are provided at the back of the book.Each puzzle is guaranteed to have only one solution.One puzzle per page (8.5 x 11 inches).128 pages.500 samurai style puzzles.
Samurai Sudoku consists of five overlapping Sudoku grids, one in the center and the other 4 overlapping each corner grid of the central one. The object of the game is to place numbers 1 to 9 in the empty cells so that each row, each column, and 3x3 box in each 9x9 grid contains the same number only once.