John Bunyan was born in 1628 in England and became a preacher, but was imprisoned for 12 years for preaching without a license. While imprisoned, he wrote his most famous work, "The Pilgrim's Progress", an allegorical novel about the Christian journey. He authored over 60 books that reflected his Christian beliefs and views on salvation through faith alone. After his release from prison, he pastored churches and continued writing prolifically until his death in 1688.