So, Audible introduced badges that you can collect. However, I find myself using Libby far more than Audible because I don't have the spare money to buy new audiobooks. Because of this, I have decided to transform those badges into a challenge here! c:

This isn't a full list, mind you. I've removed or edited several of them, especially the longer ones and the ones requiring sampling.

If I'm correct, you can add many books to each prompt. It will be marked as "complete" once you finish one of those books, but just keep adding as you work on the challenge. The final prompt is made to be completed ONLY once you have finished everything else so this challenge won't mark complete until you're done.