Hi! whomever you are,
You have an attitude problem.The gentielman only asked a simple question,and was seeking a courteous answer. perhaps unknown to you, not everyone has enough money to go out and buy every book that they may hear about.
Unlike you, Madame EV was kind enough to supply general information of what the DIET was about. Now he can decide if it is worth his time and money to invest in.
See how simple it is to be nice to a fellow human being?
Whomever you are have a great weekend in spite of yourself.
Sincerely I C L