John Wesley started it. Back in the 18th Century, when British preachers stayed put and theological tomes were bulky, expensive and dull, he revolutionized religion by sending his ministers on circuit and reaching the masses with a flood of books that were small, cheap, popularly written. He supported himself through publishing, cleared $150,000 to spread his cause. Not all the 400 books he wrote or published were religious—one was Primitive Physick, a book of home remedies (example: "The Head Ake: Apply to each Temple the thin yellow Rind of a lemon, newly pared off")...

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