There are a lot of books and movies at the library that are RF tagged...good luck.
That's the funny thing...It was on my way INTO the library the first time I ever entered the building.
I just did some Google searching and then emptied my purse and located a tag sewn into the lining. I removed it and then checked the old purse I had when I was at the library. Same tag sewn into the lining. It still doesn't make sense that it goes off with my gun in the purse but not when the gun is removed. I am going to test it the next time I go to the library now that I know for sure I can legally carry there.
That doesn't explain my husband setting it off. Maybe I should search his wallet.