In John Bunyan's timeless allegory, Christian sets off on a journey to find salvation. His path is not easy, and he is beset by trials, including the destructive Apollyon and the Giant Despair, as he pursues his pilgrimage through the Slough of Despond, the Delectable Mountains and Vanity Fair towards the Celestial City. In the second part of the narrative his wife, Christiana, is escorted by Great-Heart through the same difficult terrain. Written with the urgency of persecuted faith and a fiery imagination while its author was in prison, The Pilgrim's Progress is a spiritual as well as a literary classic.