This new seasonal title in the #1 New York Times bestselling Grumpy Monkey series celebrates fathers and grandfathers - plus we learn where Jim gets his grumpiness from!

It’s Father’s Day and Jim’s dad is all about it. He LOVES having a day where he is the center of attention. But when Jim asks his father what he does for his father on Father’s Day, he learns that Grandpanzee thinks the holiday is “a bunch of malarkey!”