The smash-hit #1 New York Times bestselling picture book!

Jim the chimpanzee is in a terrible mood for no good reason. His friends can’t understand it–how can he be in a bad mood when it’s SUCH a beautiful day? They encourage him not to hunch, to smile, and to do things that make THEM happy. But Jim can’t take all the advice…and has a bit of a meltdown. Could it be that he just needs a day to feel grumpy?