.EPUB would be great! Did you do both languages? Or did you write in one and have someone else translate it?
I would also recommend Google Podcasts. Pretty basic, but does it all very well. Queue continuity across the app and web is great. However, Google being google, they are likely to be sunsetting it soon in favour of rolling podcasts into YouTube Music (which I would also suggest in place of Spotify).
Yeah, I did this for the witness sort of. If I got stuck on a puzzle and was finishing up a session, I’d take a photo and then draw over the top of it as I went about my day, so I’d come back to the game with a solution.