Carl Gottlieb Samuel Heun (20 March 1771 – 2 August 1854), better known by his pen name Heinrich Clauren, was a German author.

He published under the pseudonym H. Clauren (an anagram of Carl Heun), and became one of the most popular authors of fiction for the middle class in the first half of the nineteenth century.

Heun brought a lawsuit against Hauff, and won, leading Hauff to write another book, Kontroverspredigt über H. Clauren und den Mann im Mond (1826), successfully destroying the reputation of Heun's works.

Fantasmagoriana was read by Lord Byron, Mary Shelley, Percy Bysshe Shelley, John William Polidori and Claire Clairmont at the Villa Diodati in Cologny, Switzerland during 1816, the Year Without a Summer, and inspired them to write their own ghost stories, including "The Vampyre" (1819), and Frankenstein (1818), both of which went on to shape the Gothic horror genre.

[5] Another of his short stories, "Das Raubschloß", may have been one of the sources of inspiration for Edgar Allan Poe's "The Fall of the House of Usher" (1839), as translated by Joseph Hardman as "The Robber's Tower" in Blackwood's Magazine.