Bright Orange for the Shroud — John D. MacDonald

The fragile-looking blonde was like a black widow spider feeding on her mate till he was broke and drained dry, a walking zombie stumbling aboard the celebrated TRAVIS McGEE houseboat The Busted Flush. And there lolls Travis McGee, that freelance knight in slightly tarnished armor whose well-known nose for a dollar twitches at the money smell. This time the scent leads by some bizarre routes to a vicious nest of confidence artists and double-crossers who inhabit some of those baleful parts of Florida the tourists never see....