Dan Croker has two obsessions - Sudoku and frogs. So he just had to combine his loves and make the Famous Frog Sudoku books. This Sharper Pencil Series book contains 1,200 puzzles - 300 easy, 300 medium, 300 hard and 300 very hard. Take your playing to the next level. There are 4 puzzles per page and a fun and colorful cover that is sure to brighten your day. Solutions are given at the end of the book. So sharpen your pencil and get solving! More Famous Frog Sudoku series - Bathroom Sudoku, Brain Yoga, Beach Bum Series and Travel Series.