I listen to the Joe Rogan podcast sometimes, and he says he "reads" books when really he listens to them, and I admit that bothers me a bit. If you didn't actually READ the words in the book, I think it's misleading to say you read it. You can just say "I listened to the book" and that would be a better explanation of how you consumed content, as I see it. Reading is not the same as listening. The definitions are clear, so if you listened to a book, rather than read it, just say you listened to it.