Love to solve difficult Sudoku puzzles? Then you are in the right place! The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 16 exactly once. Solving this sudoku book is fun but requires some advanced solving techniques. Every puzzle in this Sudoku Puzzle Book has been carefully checked to ensure that each puzzle has only 1 solution. All the puzzles are challenging and entertaining. If you are looking for something unusual and challenging, try the Mega Sudoku and enjoy! Why Our Book Is A Great Pick: High Quality and Relaxing Puzzles Great for Advance Level Solvers - Advanced Solving Techniques Required Easy to read (1 Puzzle per Page) Large 8.5 x 11 inches Makes a Wonderful Gift Idea Solutions Included Satisfaction Guaranteed! Kws: sudoku hard, hard sudoku puzzle books, mega sudoku puzzle books, sudoku puzzle books, sudoku book, books sudoku, suduko puzzle book