The author invites readers to spend time in the pleasure of Harpo's cinematic company while comparing him to tricksters from folklore, myth and legend. The book demonstrates how Harpo, the sweetest, wildest, most magical Marx brother, accomplishes the archetypal trickster's work. Thirteen chapters examine Harpo's trickster persona closely in each of the Marx Brothers' films: The Cocoanuts, Animal Crackers, Monkey Business, Horse Feathers, Duck Soup, A Night at the Opera, A Day at the Races, Room Service, At the Circus, Go West, The Big Store, A Night in Casablanca and Love Happy.

Harpo as trickster embodies luck, foolishness, cleverness, mania, hunger, lust, stealing, shape-shifting, gender-bending, alliance with underdogs, attacks on the powerful, musicality, sympathy for animals, magic and mischief. His trickster behaviors in all the films are woven into a composite impression that "with a little luck, will resonate beyond the covers of this book and leak out into the world, making it a more just, flexible, resilient, amusing and magical place."