I guess I'm often a little surprised at how quickly people jump into things without trying them first; the method is somewhat incidental, except for the fact we have tax funded institution for borrowing books. I'll buy a book with little more than a recommendation, but I'm not inclined to buy a full series, or every book by a certain author up-front even if I had read the first one.
Kind of like how some people will buy a full ski kit before ever having tried it.