The Pilgrim’s Progress is a Christian allegory written by John Bunyan. It was published in two parts in 1678 and 1684. The book tells the story of a man named Christian who is on a journey from his home, the City of Destruction, to the Celestial City. Along the way, Christian encounters many obstacles and people who help him on his journey. The book has been a best-seller for centuries and has been translated into many languages.