15 Minute Speed Sudoku - 175 hard sudoku puzzles.: sudoku,puzzle,hard,difficult,gift

Speed Sudoku - 15 minute Sudoku Puzzles The 15 Minute Speed Sudoku Book is a specially created collection of 175 hard sudoku puzzle grids. Each puzzle has between 17 and 29 clues and should take the sudoku enthusiast 12-18 minutes to complete. As this is a speed Sudoku book, the challenge is to try and complete each puzzle in under 15 minutes. If you can beat the clock, try the 5 and 10 minute Speed Sudoku Puzzle Books in the series. You are guaranteed to have many more hours of Sudoku solving satisfaction. The BUYSUDOKUBOOKS.COM guarantee. Often you find sudoku puzzles that have more than one solution. This can waste a lot of time and drain a fair amount of ones sanity while solving a puzzle. Have no fear! To ensure minimum frustration, every puzzle in this book has been carefully checked and is guaranteed to have only one solution.