Chapter 1: Stillwater

Mr. Popper, an absent-minded house painter who dreams of arctic adventures, finishes his work for the season. He lives with his wife, Mrs. Popper, and their children, Janie and Bill, in a small town, preferring to spend his time reading about the North and South Poles rather than seeking work.      ​

Chapter 2: The Penguin`s Letter

After writing to Admiral Drake, a polar explorer, Mr. Popper receives a radio reply promising a surprise. Later, a large box arrives, and to the family's shock, a penguin emerges. They decide to name him Captain Cook. 

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Chapter 3: Captain Cook

The penguin, Captain Cook, explores the house, causing chaos. He takes a liking to the refrigerator, which Mr. Popper decides to fix up for him, while Mrs. Popper remains worried about the expense of feeding a penguin. 

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Chapter 4: The Intelligent Penguin

Captain Cook proves to be highly intelligent and curious, but he is not doing well in the warm house. He is lonely and unhappy, which worries Mr. Popper and makes the family concerned for their new pet's health. 

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Chapter 5: The Trouble with the Penguin

Mr. Popper attempts to take Captain Cook for a walk, causing a spectacle in town. Following a frustrating attempt to get a license for the penguin, Mr. Popper realizes that despite the fun, the penguin is struggling and lonely, signaling the need for a change.