You will be able to make your book an audio book at any time, either during upload or in the future as a revision to your book.  All you need is a single MP3 file that has you or someone else reading your book.  Be sure to create about 3 second time gaps in between each page to make it easier to tag page turns.

Once you add your MP3 file to your book, you will have 2 options, Connected Audio or Disconnected Audio.

Connected Experience

This is when you want to create a follow along reading experience, so that when the reader is alerted to turn the page at the right time. This is great for follow along audio narrations. You will be able to select the exact point in time for each page turn that will allow our system to play a default page turning cue, "ding".  You will not need to add that to your audio file.  If a user jumps pages, the audio will begin playing from that page.

Disconnected Experience.

This is when you want to handle the entire follow along audio narration yourself (although jumping out pages will not bring the audio with it), or if you want to add sing along music.  If a user jumps pages, the audio will NOT begin playing from that page.  They would have to skip the audio ahead as well.