Don Quixote's imagination has been captured by tales of chivalry, to the point where he becomes quite mad and believes that he is a knight errant. Together with his sidekick Sancho Panza, and filled with misguided chivalric impulses, he embarks on travel and adventure. Don Quixote is a humorous parody of chivalric romance literature. Its characters and language have become widely entrenched in western language and literature. Groundbreaking and influential, it is considered by many to be one of the greatest books of all time.