I can not download audio books on to my hudl. Can anyone tell me the best sites to try?

Have you tried Google Play Store?
https://play.google.com/store/apps/d...oks.androidapp

Yes I have. It said it was audio book but it downloaded just the ebook, no audio

Strange.
AFAIK the site linked in post 2 is for audiobooks only - not free and certainly not cheap IMHO
An example http://www.audiobooks.com/audiobook/...a-slave/200762
Nowhere does it mention ebooks.
Try here https://play.google.com/store/apps/d...ard.audiobooks