The Twenty-One Balloons, by William Pene du Bois

A retired schoolteacher is found in the Atlantic Ocean with twenty deflated balloons.

Professor William Waterman Sherman is a retired school teacher. He decides to take a leisurely balloon trip, departing from the city of San Francisco. His balloon is somewhat of a luxury one, as it carries a basket the size of a small house, fitted out with the basic necessities for comfortable living. The trip goes well, with the Professor flying over the Pacific Ocean, until some seagulls start pecking at his balloon. He crashes to earth and finds himself on the volcanic island of Krakatoa. It is there he meets a certain Mr F, who introduces him to the unusual inhabitants of the island. Twenty families reside there, living on what they term a “restaurant economy”, equally sharing cooking responsibilities and making sure the cuisine is always varied and delicious. The most extraordinary aspect of the island is the revelation that it contains a diamond mine, with enough diamonds to make all the island's residents multi-millionaires. However, there is a sting in the tail of this apparent good fortune. The full diamond value can't be realised because if they were all sold on the world market it would chronically depreciate their value.

The residents spend their days in pleasant pursuits, and have invented some interesting technologies of their own. One charming novelty they have created is a merry-go-round which is suspended with balloons. Another invention involves a huge suspended platform – again with balloons, twenty in all – that is to be used in case of a volcanic eruption, when a speedy getaway for Krakatoa's residents would be required.
When the Professor is later found mysteriously floating in the Atlantic Ocean, he is rescued and presents a talk at the Western American Explorers' Club about his experiences.

William Pene du Bois published The Twenty-One Balloons in 1947, with illustrations by himself. The book soon went on to win an award, the Newbery Medal. It's an exciting and innovative adventure story, with plenty of amusing contraptions described in minute detail – think TV's Gilligan's Island, but technologically more sophisticated. The novel is well paced and lively (the early scenes describing the gathering excitement as the Professor travels to deliver his speech, from a specially prepared bed to accommodate his fatigue, is especially amusing).

A thoroughly enjoyable children's classic full of energy, invention and good cheer. 

The Twenty-One Balloons, by William Pene du Bois. Published by Puffin.

MAY23