Dan Croker has two obsessions - Sudoku and frogs. So he just had to combine his loves and make the Famous Frog Sudoku books. Move your playing to the next level with this Sharper Pencil series book of 200 puzzles. Containing 50 easy, 50 medium, 50 hard and 50 extra hard, with 4 puzzles per page and plenty of space for notes, plus a funny cover to brighten your day. Solutions to each puzzle are printed at the end of the book. 5.5" x 8.5". So sharpen your pencil and get solving More Famous Frog Sudoku series - Bathroom Sudoku, Brain Yoga, Beach Bum Series and Travel Series.