"Actually, I am looking for a book of Christmas carols so I can sing them to the old people I play for. Not much time left!"
I often find such things in thrift shops, if that helps any. If you talk to the people there, they might even save such and call you. Of course, it might be too late for this year. Worth a try, anyway.
Might try the library, as well. Even if they are in the reference section, you could xerox the ones you want.
Monday I'm heading for the library and used book stores!