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69 pages 2 hours read

William Pene du Bois

The 21 Balloons

Fiction | Novel | Middle Grade | Published in 1947

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Background

Historical & Scientific Context: Krakatoa Volcanic Activity

Krakatoa, a volcanic island wedged between the islands of Sumatra and Java in the southwest Pacific, exploded in 1883 with a force four times greater than the biggest nuclear bomb ever detonated. It could be heard thousands of miles away. Upwards of 40,000 people died in the explosion and the resulting 90-foot tidal waves. Smoke and ash caused spectacular sunsets worldwide, lowered the atmosphere’s temperature slightly, and may have caused the all-time record for rain in Los Angeles in 1884.

On the Volcanic Explosivity Index, the Krakatoa explosion is listed as a VEI 6, a very large and rare eruption. Though it’s popularly believed to be the biggest one in history, in fact several other volcanoes in recent centuries have unleashed comparable amounts of energy: Mt Pinatubo in the Philippines in 1991, Novarupta in Alaska in 1912, and Huaynaputina in Peru in 1600. The Hunga Tonga eruption of 2022 also is rated VEI 6, and its boom was heard in Alaska, 6,000 miles away.

The remains of Krakatoa, including a new island, Anak Krakatoa, that is rising amid the exploded remains, belongs to present-day Indonesia. The volcano continues to have periodic eruptions, though none yet as large as the 1883 explosion.

Literary Genre: Utopian Novels, Social Satire, and Travel Adventures

Sherman’s visit to Krakatoa, with its hidden society living in a carefully organized private paradise, both references and influences several books written over the centuries that have similar settings. Utopia, a 1516 book by Thomas More, imagines a distant island populated by a society that functions in a manner that More believed would be ideal. Erewhon, by Samuel Butler, is a satire that proposes a faraway land where many of the Victorian ideals of the English are reversed, and where machines are forbidden because of a fear that they might someday evolve to become conscious and malevolent.

Daniel Defoe’s 1719 novel Robinson Crusoe describes how a man survives while marooned on an island. A 1726 book by Jonathan Swift, Gulliver’s Travels, counters Defoe’s optimism with the story of an adventurer who is shipwrecked successively on lands occupied by tiny people, giants, and talking horses; each society’s silly practices lampoon the weaknesses of English society. The hero returns home, where he prefers the company of his estate’s horses.

Using faraway islands or distant lands as the settings for imaginary cultures made sense in a time when Europeans hadn’t yet explored the far reaches of the planet to any great extent. By the late 1800s, though, most places were well known, and author Pène du Bois placed his utopian world on an island that blew up and largely disappeared because there is no way to know for sure how, or if, such a society might have lived, other than in the author’s imagination.

Mentioned in The Twenty-One Balloons is the 1872 Jules Verne adventure novel Around the World in Eighty Days, in which the hero, Phileas Fogg, sets off on a trip around the globe. In the book, Fogg doesn’t use a balloon, but the speed of his trip using railways and steamer ships captures the world’s attention. Steam-powered transportation revolutionized travel during the Industrial Revolution, and Professor Sherman manages to beat Fogg’s speed record, if only by accident.

Literary Context: Plagiarism

Creative people sometimes invent works of art that have obvious similarities. In music, for example, a number of popular songs sound similar, and law courts have had to decide whether, and whom, to penalize for the overlap. Books, too, end up in court over charges of plagiarism. In an Author’s Note to The Twenty-One Balloons, Pène du Bois apologizes for the similarities between his story and one written by F. Scott Fitzgerald, “The Diamond as Big as the Ritz” (2).

Pène du Bois learned of the story from his publishers. It has several similarities: Both tales contain a mountain of diamonds; in both, the locals imprison or kill visitors to keep their secret intact, and the mountain blows up. In other respects, the stories are quite different: “Diamond” is a dark tale of murder written for adults, while Balloons is a utopian fantasy adventure for children with elements of science fiction in its fanciful technological innovations.

A 1957 political novel, Atlas Shrugged by Ayn Rand, depicts a secret mountain hideaway for rich tycoons who rebel against society’s strictures. Neither this nor The Twenty-One Balloons has ever been considered an example of plagiarism, despite similarities to the Fitzgerald work or to each other. Instead, the resemblances are understood to be coincidental. 

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