Sudoku Puzzle Book, 600 Puzzles, 300 MEDIUM and 300 HARD: Improve Your Game With This Two Level Book

***CLICK ON MY AUTHOR NAME FOR MORE GREAT SUDOKU PUZZLE BOOKS!*** Relieve boredom and stress by playing Sudoku. With two levels of difficulty this Sudoku Puzzle Book will soon improve your game. There are 4 puzzles per page and solutions are at the end of the book.