All the world knows that Bunyan wrote The Pilgrim's Progress, in two parts, of which the first appeared at London in 1678, and was at all events, begun during his imprisonment in 1676; the second in 1684. The earliest edition in which the two parts were combined in one volume was in 1728. A third part falsely attributed to Bunyan appeared in 1693, and was reprinted as late as 1852. The Pilgrim's Progress is the most successful allegory ever written, and like the Bible is adapted to man in every clime. It is indeed commonly translated by Protestant missionaries after the Bible. It is thus read in all literary languages and is a world-classic.
Bunyan, (1628 - 1688), was a popular preacher as well as a very voluminous author, though most of his works consist of expanded sermons. In theology he was a Puritan, but not a partizan; nor was there anything gloomy about him. He was no scholar, except of the English Bible, but that he knew thoroughly.