Who is the king of all demons?
Asmodeus
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]