"Do you think you would need more than one page to summarise your learning from the book?"
Probably, although I haven't actually done that. Even if it were only one page, I think that would make it worthwhile to me.
"You could have always read any of the articles online, where you would have also had more choice."
I guess so, but reading online tends to give me a headache, and I like to read in bed which I can't do easily with my machine (and printing out articles tends to be more expensive for me than buying a book.)
I wasn't really attempting to debate the OP's views; I had enjoyed reading the book and thought another opinion might be of interest.
chas