The Independent Book of Sudoku Vol 1 Author:Hazel Norris Sudoku is the puzzle craze that's taking the world by storm. The idea is deceptively simple: just fill in the 9-by-9 grid so that every row, column, and 3-by-3 box contains the digits 1 through 9. No math is involved, simply logic and reasoning. This book contains 130 puzzles, covering all difficulty levels, from easy to advanced. Tips for solvi... more »ng and full solutions are included for all of the puzzles.« less