Looking for some audio book recommendations, I know Eldar books are rare, so something involving the Eldar at least would be great 
Whoops, missed this!
I don't know if you've read Warzone: Valedor, Mage?
You probably wouldn't think much by the title of the book, but it is straight up the best Aeldari Craftworlds novel I've ever read. There is so much lore about the Aedlari of Iyanden and Biel-Tan in this book, their societies, and a lot of cool stuff about Prince Yriel and the Sunblitz Raiders, the battle of Iyanden against Hive Fleet Kraken (?), and then fighting Kraken and Leviathan on the world of Valedor. You even learn some stuff about the wraithguard.
I will check to see if this is an audiobook.