Grumpy Monkey by Suzanna Lang, and illustrated by Max Lang, 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?