"The Pilgrim's Progress" is an allegorical novel written by John Bunyan in the 17th century. It follows the journey of a character named Christian as he travels from the City of Destruction to the Celestial City, representing the path of a believer seeking salvation. Along the way, he encounters various challenges and characters that symbolize different aspects of the Christian faith. The story is divided into two parts, with the first focusing on Christian and the second on his wife, Christiana, and their journey. The book illustrates themes of faith, perseverance, and redemption, making it a significant work in Christian literature.