This is a super cute Sudoku puzzle book that features cats on every page. This book is 8-1/2 x 11 inches in size with only 4 puzzles per page so they are easy to see and there is plenty of room to work.There are 3 difficulty levels and a total of 100 puzzles. This book includes:100 hard puzzles / very hard puzzles Extreme puzzlesSolutions for all puzzlesOver 100 full-page puzzles for hours of enjoymentAccess to more puzzles you can download