I stood next to the guy who got stopped at the turnstile. He asked the turnstile operator why he needed the book and the operator replied, "so we know its your ticket". He them asked the question, "if I brought the book how would you know that I was the person on the front of the book" which is a valid point.
The club are being really petty with this. If you've got a spare ticket you should be able to give it to someone else to use. Its been happening for donkeys years and its never going to change. Its not as if there is a big black market for tickets.