WG yanked this one off the public library shelf arbitrarily. It was about Christmas which was good enough for her.
The premise of the story is that Santa needs a substitute and he selects a haphazard calamity joe that makes many mistakes trying to be Santa and questions the principles of giving gifts only to the good kids.
YOU MUST GET IT or READ IT if your RAD had trouble with the "naughty and nice" list.
"How Murray Saved Christmas" by Mike Reiss