Book excerpt: Sudoku Book For Kids Ages 8-12. 80 level hard Sudoku Puzzles 9x9 with solutions! The sudoku puzzle grid consists of 9 rows, 9 columns,and 9 inner boxes. A completed puzzle has the numbers 1-9 in each row, in each column, and in each inner box.To start, some numbers are removed. Solving the puzzle means figuring out what the numbers to fill back in.Sudoku rules are relatively uncomplicated - but the game is infinitely varied, with millions of possible number combinations and a wide range of levels of difficulty. Don't Repeat Any Numbers Don't Guess Use Process of Elimination This book contains: 80 Sudoku puzzles and solutions! 9x9 puzzles difficulty level: Hard Cover Finish: Glossy Dimensions: Print 8.5" x 11" size - (21.59 x 27.94 cm) Interior: White Paper Pages: 102