Who is the king of all demons?
Asmodeus
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In 1641, the Spanish playwright and novelist Luis Velez de Guevara published the satirical novel El diablo cojuelo, where Asmodeus is represented as a mischievous demon endowed with a playful and satirical genius. The plot presents a rascal student that hides in an astrologer's mansard. He frees a devil from a bottle. As an acknowledgement the devil shows him the apartments of Madrid and the tricks, miseries and mischiefs of their inhabitants.[38][39] The French novelist Alain-René Lesage adapted the Spanish source in his 1707 novel le Diable boiteux,[36] where he likened him to Cupid.  In the book, he is rescued from an enchanted glass bottle by a Spanish student Don Cleophas Leandro Zambullo. Grateful, he joins with the young man on a series of adventures before being recaptured. Asmodeus is portrayed in a sympathetic light as good-natured, and a canny satirist and critic of human society.[36] In another episode Asmodeus takes Don Cleophas for a night flight, and removes the roofs from the houses of a village to show him the secrets of what passes in private lives. Following Lesage's work, he was depicted in a number of novels and periodicals, mainly in France but also London and New York.[40]