Dan Croker has two obsessions - Sudoku and frogs. So he just had to combine his loves and make the Famous Frog Sudoku books. This Giant Puzzle Series book contains the biggest ever 9 by 9 grid Sudoku puzzles. The gigantic sized puzzle uses the whole letter size page which leaves plenty of space for penciling in the possibilities. With 400 very hard puzzles and a fun and colorful cover that is sure to brighten your day. Of course, you don't have to be a giant to do these puzzles! Solutions are given at the end of the book. 8.5" wide by 11" high. More Famous Frog Sudoku series - Sharper Pencil, Bathroom Sudoku, Beach Bum, Travel Sudoku, Brain Yoga and Take A Break Series.