Idaho, like many other states, has a law that says library records are to be held confidential. You cannot provide any information that would in itself, or if used with other public records, provide information about what a patron has checked out, requested, or services used by that patron. (Without a supeona or court order, of course.)

In this case, it was legal. Only the Baker's address was given, and from the address you can't deduce his library use. And we wouldn't give even that information to just anyone ("Miss, (drool, slobber) kin I have the phone number of that cute little girl over there?") -- you'd better be a copy, an EMT, or have a VERY cogent reason for the information. Otherwise, we'll had you a phone book.