https://www.myanonamouse.net/ (private tracker but relatively easy to enter as they have open interviews each Saturday and Wednesday if I remember correctly)
Whenever this question comes up I see myanonamouse recommended as a private tracker.
I just wanted to throw in that there is also a tracker called abtorrents which hosts audiobooks and ebooks, though I believe most or all of them are english.
I cannot speak as to the selection between those two unfortunately.
I've downloaded many off of the internet service. Plus there's a bunch on YouTube you can download with a browser extension or a website that can convert it for you.