Here's the ultimate treat for all fans of the number-placement puzzle sudoku: a mega collection of 1000 grids arranged by level of difficulty.
Sudokus are fun and satisfying to solve, and give our brains a good workout too. This compilation will satisfy even the most ardent enthusiast, and the beginner can enjoy the pleasure of working up through the levels as their solving skills improve. - 1000 PUZZLES AND SOLUTIONS: This mega book of puzzles will provide many hours of entertainment.