Well, tbh, I read a lot via tts, though usually not published fiction these days, and I have complicated love/hate for it. But a good audio performance really can elevate a book (and also, I read almost entirely on my commute these days, meaning on public transit where it is very loud, and my brain is much better at parsing spoken English by a human voice than TTS when it is noisy). Anyway, if you want a pair of very good performances, try Code Name Verity, which has a different reader for each half. Both excellently cast. Or if you want a true multi-voice production with effects, try, Illuminae. Either will give you a sense of what good performance and good production can do for a book. Of course, a poor performance can also really detract.