"You are cordially invited to the BIGGEST, BESTEST, HATTIEST party of all time "
Come join the fun--but only if you have a hat. AND you know the entry rules. Unfortunately, there seems to be a surprising number of those, as a young boy discovers. Will he--and the cool collection of animals he befriends along the way--ever get in? Gloriously illustrated, the art contains loads of details that serve as clues to the satisfying surprise...