Okay, one free audiobook from Audible vs all audiobooks from a library for free...
For what it's worth, I just signed up audible via amazon.com and for the first three months, I can get one audiobook for $7.95/mo and after that, it's $14.95/mo for one audiobook plus discounts on additional purchases.
I have another account with audible from many years ago and I have to say, I really like that there's an audible app for iOS now (because going through iTunes was a royal pain) and once I download an audiobook from either account, it doesn't matter which one I'm signed into -- I can access currently downloaded ones from either account.
I'm on chapter 16 and I'm trying to make it last as long as possible --
♬ Music is life ♬