This is a summary/study guide of Don Quixote.

Don Quixote is a Spanish novel by Miguel de Cervantes. Published in two parts, in 1605 and 1615, Don Quixote is the most influential work of literature from the Spanish Golden Age and the entire Spanish literary canon. As a founding work of modern Western literature and the earliest canonical novel, it regularly appears high on lists of the greatest works of fiction ever published, such as the Bokklubben World Library collection that cites Don Quixote as the authors' choice for the "best literary work ever written".

The story follows the adventures of a noble (hidalgo) named Alonso Quixano who reads so many chivalric romances that he loses his sanity and decides to become a knight-errant (caballero andante), reviving chivalry and serving his country, under the name Don Quixote de la Mancha. He recruits a simple farmer, Sancho Panza, as his squire, who often employs a unique, earthy wit in dealing with Don Quixote's rhetorical orations on antiquated knighthood. Don Quixote, in the first part of the story, does not see the world for what it is and prefers to imagine that he is living out a knightly story.

When first published, Don Quixote was usually interpreted as a comic novel. After the French Revolution, it was popular for its central ethic that individuals can be right while society is quite wrong and seen as disenchanting. In the 19th century, it was seen as a social commentary, but no one could easily tell "whose side Cervantes was on". Many critics came to view the work as a tragedy in which Don Quixote's idealism and nobility are viewed by the post-chivalric world as insane and are defeated and rendered useless by common reality. By the 20th century, the novel had come to occupy a canonical space as one of the foundations of modern literature.