The Pilgrim's Progress, written by John Bunyan, is a classic work of Christian allegory. Published in 1678, it narrates the journey of the protagonist, Christian, from the City of Destruction to the Celestial City. Laden with symbolism, the novel explores themes of faith, salvation, and the trials faced on the path to righteousness. As Christian encounters various characters such as Evangelist and faces challenges like the Slough of Despond, the narrative serves as an allegorical depiction of the Christian life. The enduring impact of Bunyan's masterpiece lies in its timeless reflections on the spiritual journey.