My thoughts are similar to the author's. With books, the upside seems so high that even if a book is more expensive than usual I can always rationalize the purc

My thoughts are similar to the author's. With books, the upside seems so high that even if a book is more expensive than usual I can always rationalize the purchase by postulating whether it will be a "game changer", in which case even $100 is a relatively small price to pay.