Whether you are a certified Sudoku player or a newcomer to the craze, this set of quick and easy sudoku puzzles is a great way to polish your skills. This set includes 4 books of PUZZLING PUZZLES including 9 x 9 grids for an even faster fix of the fun, addictive challenge that is gripping the nation. Each book contains 150 fast fun puzzles, from Primary level to Professional level puzzles with solutions.