That is insanity that was never envisioned when copyright was created. First-sale doctrine is well established. If you buy a book, you can give it away, sell it

That is insanity that was never envisioned when copyright was created. First-sale doctrine is well established. If you buy a book, you can give it away, sell it or lend it to anyone you want. Those rights should not simply disappear when you start dealing with a digital book.