You want it structured? You need the book - the "AI" won't solve it for you (well, if we discount cases of word for word reproduction... which we probably shouldn't, but this does not seem to be the argument here).
The kind of people, that read the books, are the kind of people that largely won't settle for a chatbot as a replacement.
Can there be another reason for the sales drop? Unemployment, "death of the junior", lower wages?