Double Black Diamond Hard Sudoku (Sit & Solve)
by Longo, Frank
Product Type: Bargain Books
List price: $5.95
copies bought in the last week
Warning: danger ahead! These treacherously tough puzzles all require upper-level solving techniques to conquer. So, if you want hard sudoku that's easy to take on the go, this Sit & Solve® collection is the ticket. Attractively packaged, it's a terrific gift or stocking stuffer for hardcore sudoku fans.