Gary Farber points to this article on Jack Chick, the world's most widely published author, who specializes in apocalyptic evangelical comics. It's a fascinating read.

Obligatory new-media nod:

Chick's choice of medium was not that odd—for the 17th and 18th centuries. He comes from a grand tradition of pamphleteers, writers like Daniel Defoe, Jonathan Swift, and Thomas Paine, who exploited the new technology of movable type to reach the masses in previously unimaginable numbers. Starting in the 1640s, pamphlets about everything from religious reform and phrenology to the injustice of the Stamp Act were everywhere, their authors at the forefront of the world's first true media boom. In many ways the pamphlets of that era functioned much like today's Weblogs. Chick, however, has done bloggers one better, finding ways to get his message to places still untouched by the Internet. Missionaries regularly take his tracts into the world's most isolated regions—and pay Chick for the privilege, at about 14 cents a tract.