iTunes and iPods/iPhones have the ability to remember where in the book you stopped should you pause or disconnect your iPod. This is tremendously useful because I drive different cars and scrolling through a 54 hour long audio book to find my spot is a pain. The catch is this functionality only works on audio books that are in a particular format that only Apple or Audible.com support.

Well I get my music from a variety of sources, much of it in MP3 format from rented audio books. iPods don’t remember where you stopped on an MP3 file, only on the M4B format. I did some Googling and as recommended by Michael Alderete I downloaded and used MP3 to iPod Audio Book Converter. It converts MP3 audiobooks to the M4B format, can combine multiple MP3 files into a single file, and is free. Best of all, it works wonderfully.