"Don Quijote" is a novel written by Miguel de Cervantes, first published in two parts in 1605 and 1615. It tells the story of Alonso Quixano, a man who becomes so enamored with chivalric tales that he decides to become a knight-errant, adopting the name Don Quijote. He embarks on various adventures, often mistaking ordinary objects for grand challenges, such as believing windmills are giants. The novel explores themes of reality versus illusion, the nature of heroism, and the impact of literature on life. Sancho Panza, Don Quijote's loyal squire, accompanies him, providing a contrast to Quijote's idealism with his practical outlook. Together, they navigate a world that often misunderstands their intentions.