With Audible's suite of mobile apps, last listening position, bookmarks and notes are saved in the cloud, ensuring drivers always pick up where they left off when they open their iPhone app.

ENGADGET: BMW and Mini cars add iOS integration for Audible, Glympse, Rhapsody and TuneIn

Amazon's Whispersync technology synchronizes a customer's last page read, bookmarks and annotations across all of their devices, so they can always pick up where they left off.

ENGADGET: Amazon's new Kindles now available in Canada, Paperwhite starting at CAD $139