Digital Audiobooks have been enjoying double digit sales increases for the past four years and in the past eight months the format generated over $336 million dollars and at the some point last year it made $244 million. Tapes and to a lesser degree CD's were the most popular audiobook format since the 1990's, but in recent years sales have suffered. Physical audio brought in … [Read more...] about Did you listen to audiobooks on Cassette Tapes?