great just proves my point that I was being recorded without my permission?
People don't need your permission to record you in public.
If they turn around and publish it publically that is a different matter, but in general recording in a public place is not against the law.
This is the exact same thing as the bank not being able to tell you that you can't go out and spend all your money on drugs because you still owe them $3000 on your loan. Once the money is no longer in your hands, it is no longer your choice where it gets spent.
The library's mandate is, more than likely, to provide a free, open, public source of knowledge and reading. The source of those materials is up to the library to decide to provide. That may be buying from a local bookseller, it could be from buying from Amazon, or it could be a lending system that is partnered with Amazon and therefore is subsidized by that advertising. The Library has NO, ZERO, ZILCH requirement to answer to every tax paying citizen as to its actions. This may be a democracy or whatever you technically want to call it, but one thing it does not have is a mandate for every government entity to answer to every tax paying citizen. If you have a problem with how tax money is being spent take it up with your representation given to you by the constitution, your elected officials.