When money tries to buy beauty, love, knowledge, connection, and so forth, either the buyer receives a counterfeit, or the seller, having sold the infinitely precious for a finite sum, is exploited. It is really quite simple; as the Beatles put it, “Money can’t buy you love.”
With a physical book, you certainly do own it. If you download a Kindle book to your computer, it is saved as an ASZ file in a folder titled “My Kindle Content” under Documents, by default. You do not own the Kindle e-book file because when you ‘bought’ the e-book, in reality, you just bought the right to view the file.