Famous Frog Sudoku 400 Very Hard Puzzles With Solutions: A Travel Sudoku Series Book

Dan Croker has two obsessions - Sudoku and frogs. So he just had to combine his loves and make the Famous Frog Sudoku books. This Travel Sudoku Series pocket sized book containing 400 very hard puzzles is perfect to take on short or long trips. With only 2 puzzles page page there is plenty of room for notations. The fun and colorful cover is sure to brighten your day. Of course, you don't have to be traveling to do these puzzles! Solutions are given at the end of the book. 5.5" wide by 8.5"...