Master Flea: A Fairy-Tale in Seven Adventures of Two Friends is a humorous fairytale fantasy novel by E. T. A. Hoffmann first published in 1822. Set in the city of Frankfurt am Main, the novel follows the story of Peregrinus Tyss, who becomes entangled in the conflict between supernatural characters in bourgeois form over Dörtje Elverdink, in reality Princess Gamaheh of Famagusta.