I don't know the details of the law, but I'm morally 100% OK with that. If I bought a copy of a book, I feel completely justified in reading it in whatever form

I don't know the details of the law, but I'm morally 100% OK with that. If I bought a copy of a book, I feel completely justified in reading it in whatever format's convenient for me. By analogy if I buy a DVD, I might rip it and watch it on my computer. I don't draw a moral distinction between ripping a copy of that DVD and downloading a ripped copy of it: the end result is a .mov file on my hard drive. Well, same with physical books and epubs. I could morally (and I'm pretty sure legally) scan and OCR that book myself as long as I don't distribute copies of it, so downloading seems to me to be just skipping the labor step in the middle.