Recently Amazon rolled out Audible Channels as a new benefit to Prime subscribers. Channels similar to podcasts and to some degree compete for listeners. If you are an Amazon Prime member and an Audible customer then you can subscribe to topical feeds filled with interesting content like The Great Courses, McSweeney's, and HBR.
The topics are interesting, such as a Great Course series on the realities of life in ancient Rome. The Audible SciFi channel provides a variety of short story audio books for free.
Get the Audible app for iOS and browse the channels right from your device.