There's Something In A Sunday Sharon Mccone Mystery Series, Book 8.

It's a cold Sunday in San Francisco. Sharon McCone's alone on a routine surveillance job, following a man named Frank Wilkonson through the city's lush horticultural hot spots to the sere foothills of the Diablos. But when she returns to find her kindly old client in a pool of blood, nothing she's learned explains it. The search of answers takes her from Wilkonson's sullen brood on Burning Oak Ranch, to the eccentric havoc of a household in the H...