How to transfer books from Mac to iPad?
With iTunes no longer supporting books (PDF and epub), I don't see an Apple-ecosystem way to transfer books to iOS devices by USB. As far as I can see, there's no sync arrangement through Mac iBooks. For clarity, I'm talking about third-party books, not those bought from Apple.
Is there a way?
iMac with Retina 5K display, macOS Sierra (10.12.6)