It IS frustrating. I agree. I was shocked when I saw a message in this forum. I thought maybe it was an answer to my question, but no luck.
I can't answer your question about the book because, as you saw, I've got the other one. I still don't know if "Up and Running" is the book we need. We may never know! There are lots of training videos here and on YT.
There is also "Reaper User Guide". Have you downloaded it? It's here:
http://www.reaper.fm/userguide.php
It's 400+ pages! One can purchase a printed, bound one and I have been meaning to do that but just haven't yet.
Good luck!