Who says sudoku covers have to be boring? I deny the nay-sayers (pun intended ) and present this Happy Horse Sudoku book for your enjoyment. This latest series out of the Fat Dog Publishing stable contains regular sudoku for adults and advanced kids, with a fun cover that hopefully brings a smile to your face and everyone who sees it. This edition contains 500 extra hard puzzles, 4 per page and solutions at the end of the book. 8.5" x 11".