In an engaging story with the humor and silliness of Curious George, Caldecott Honor illustrator Diane Goode presents the hilarious tale of a young boy and his pet monkey aboard an ocean liner.

Bertie and his pet monkey Mo are thrilled when they receive an invitation from Bertie's grandfather to join him for lunch on the Blue Star luxury cruise ship. There's only one rule, Bertie's grandfather tells them: Mo must act like a gentleman. Once they're on board, Mo decides to behave just like the grandest gentleman he sees--in typical "monkey see, monkey do" fashion. Mo helps a lady into her chair, but somehow she lands on the floor! He even dances with two of the finest ladies...but doesn't notice they're already dancing with their husbands! Unhappy, Mo goes for a walk on deck, where he sees the grand gentleman fall overboard. Without thinking, Mo leaps over the rail just as the gentleman did, and he saves the man, proving that a monkey can be a true gentleman after all.