Pilgrims Progress is a spiritual classic, but it is also a classic of literature. The scholarrly introduction gives a very clear understanding of the book and its background, and of Bunyan himself. Even for anyone with no interest in things Christian, it would be a rattling good yarn, vividly written so that when Christian and Hopeful are imprisoned in Doubting Castle by Giant Dispair the reader himself begins to feel dispair, and the battle with Appolyion is truly terrifying. The characters, despite their obviously didactic names, (for this is an allegory) are credible as human beings. Even the landscape is lovely, and for those who are interested, the Delectable Mountains are the Chilterns.