Midnight Clear by Mary Kay Andrews

In this heartwarming, suspenseful, and hilarious novel, Callahan Garrity and the outrageous band of "girls" in her Atlanta cleaning crew join together during the Christmas rush to prove that her trailer-trash brother didn't kill his even trashier estranged wife.

It's a few days before Christmas, and sometime sleuth/full-time cleaning lady Callahan Garrity has things under control for a change, until her ne'er-do-well brother, Brian, shows up. He's kidnapped his toddler daughter, Maura, from his estranged wife, a vengeful shrew with the law on her side.

When his ex-wife is found dead, the cops suspect Brian. To save her brother and her holiday, Callahan, along with her irascible mom, Edna, and a gaggle of House Mouse employees, will crisscross yuletide Atlanta, going everywhere the search for truth leads.