9 Twin Brothers Bail Bond Mysteries — R.T. Lawton

The proprietor of the Twin Brothers Bail Bond firm only takes on special clients who are then required to put up high value collateral. This collateral, often stolen or illegal goods, is promised to be returned after the bond is no longer needed, but somehow these special clients seem to fall from high places, go deep water swimming without appropriate breathing equipment, become victims of an errant taxi cab or otherwise render themselves deceased. And yet, the bail firm always makes an exorbitant profit on the arrangement.
Theodore Oscar Alan Dewey, bail agent, desirous of not having any personal accidents to himself, conducts the proprietor's darker errands and provides him with various clues, thus allowing the proprietor to solve a mystery in each of their ongoing adventures in crime.