What you can't do is declare that your payment means that you actually bought the rights to the text of the book or anything else you unilaterally and post facto include in the purchase for philosophical reasons, when those things weren't included in the offer that you accepted. What was offered, and you accepted, was a license to unlimited personal listening to an audio performance. If you want something else, make an offer or wait for them to make one.
It's not quite as simple as this because governments often want to get into the deal and declare that certain offers aren't what the offerer offers but what the lawmakers think he should have offered, but absent this intercession, you were offered an audio performance for a certain price, and if you accepted, that's what you got.