Sudoku Puzzl, 1,500 Extra Hard Puzzles: Gigantic Bargain Sized Book, No Waste...
Sudoku Puzzl, 1,500 Extra Hard Puzzles: Gigantic Bargain Sized Book, No Wasted Puzzles with Only One Level by Books, Sudoku Puzzle, ISBN 1542748119, ISBN-13 9781542748117, Brand New, Free shipping in the US