"it's a real surprise to me if the documentation isn't because I thought that was free to use by anyone."
All my work has had a copyright notice attached to it by me.
Not a creative commons whatever, an all rights reserved notice.
If someone had copied my site, stuck a couple of googleads on every page and tried to make money out of my work that way, I would be rightly annoyed. I see this as no different at all. Not in the slightest.
My server logs also tell me who has looked at what, and when.
" Larry would be perfectly free to conduct appropriate research and include appropriate references."
If he is violating copyright in anyway shape or form, that is not on.
Odd.... thread here recently where a member was inspired to release a theme which certain others pointed at and effectively shouted THIEF! ....... yet along walks another guy who aims to make money from others work, and we have a moral wing saying "Hey, y'know that's cool"
Produce a book ... fine. But I for one would scour that for the very slightest copyright violation. And I would act on that.