Miguel de Cervantes (1547-1616) is Spain's most famous author, primarily because of his celebrated novel Don Quixote. His first love, however, was the theater, for which he wrote extensively. His Interludes, published 400 years ago in 1615, are short, comic plays that explore the underbelly of Renaissance Spanish society. Their characters include hillbillies and con artists, pimps and prostitutes, adulterous wives and jealous husbands,...