This book contains 320 puzzles sudoku book for adults easy to medium. All of the puzzles inside the book are 9x9. Sudoku rules are easy. Each number 1,2,3,4,5,6,7,8 and 9 must appear only once in each row, column, and region. Complete this puzzle so that every row across, every column down and every region contains the numbers 1 to 9. Each row and each column have only one and exactly one of each of the numbers 1,2,3,4,5,6,7,8,9 * 320 Sudoku Books for adults in easy to medium level * Sudoku puzzles grid size in the book are 9x9 that are played with nine number 1,2,3,4,5,6,7,8,9 * Puzzles are printed on quality white paper, paper size 8,5 x 11 inchesSudoku puzzles are a proven method for enhancing logic skills. As a logic puzzle, Sudoku is also a great brain game. By using this selection of sudoku puzzle books you would experience enhanced brain capabilities for example logical thinking and memory. Choose your book today by clicking on the BUY NOW button at the top of this page.