Life of Don Quixote and Sancho is arguably Unamuno s most defining work, an audacious abridgment of the classic work from the seventeenth century. Finding that Miguel de Cervantes did not tell Don Quixote s story very well, Unamuno presents Cervantes s story the way he believes it should have been written, thereby weaving narration, commentary, and philosophy into a seamless whole. Unamuno here defines and exemplifies the courageous philosophy of Quixotism at length, revealing unexpected correspondences with existentialism.