Don Quixote is a satirical and deeply philosophical novel that follows Alonso Quixano, a man who becomes so obsessed with books about knights and chivalry that he loses touch with reality. Reinventing himself as Don Quixote, a self-proclaimed knight-errant, he sets out on a quest to revive chivalry and do noble deeds in a world that no longer believes in such ideals.

Accompanied by his loyal squire, Sancho Panza, Don Quixote embarks on a series of often absurd and comedic adventures—most famously, mistaking windmills for giants. His delusions lead him into conflict with the mundane reality around him, and while others mock him, the story ultimately reveals his deep humanity and unwavering idealism.

The novel explores themes of idealism vs. realism, madness vs. sanity, and the power of literature and imagination. Through its humor and pathos, Cervantes critiques the society of his time and reflects on the eternal human struggle between dreams and reality.

In the end, Don Quixote regains his sanity but dies soon after, leaving readers with a bittersweet reminder of the beauty—and cost—of believing in something greater than oneself.