Re: DRM means you don't own your content
"That includes PHOTOCOPYING it."
Depends. For as long as the copyright is valid, you cannot photocopy the whole book and sell / distribute the copies. You are free to photocopy the whole book for your own use or limited non-commercial distribution (ie give to your spouse or lend to a friend).
You are also free to photocopy or otherwise use excerpts of the book as illustrations, as part of a parody or critique. In these cases, it's also OK if you are commercially distributing your parody / critique that includes the excerpts. That's specifically allowed by copyright law