It's good to have a read of this, just to give some perspective if you run into someone telling you how e-books are going to destroy the publishing industry, if such folks still exist.
Here’s a little perspective: In 1939, gas cost 10 cents a gallon at the pump. A movie ticket set you back 20 cents. John Steinbeck’s The Grapes of Wrath, the year’s bestselling hardcover book, was $2.75. For a nation suffering 20 percent unemployment, books were an impossible expense.
But in just one day, Robert de Graff changed that. On June 19, 1939, the tall, dynamic entrepreneur took out a bold, full-page ad in The New York Times: OUT TODAY—THE NEW POCKET BOOKS THAT MAY TRANSFORM NEW YORK’S READING HABITS.
The article is a really fascinating look at the last revolution in the industry, so worth a look. you can read it here: http://www.mentalfloss.com/article/12247/how-paperbacks-transformed-way-americans-read