I had two elderly characters in my novel Finders, Inc. named Ozzy Mayer and Augie Shepherd who turned out to be some slightly unsavory fellas. But they were REALLY fun to write, because they were so different from any other characters I’d ever written — they were pretty amoral, selfish, and calculating, and they hadn’t done a day’s worth of honest work in their 60+ years of existence.

So of course I had to write a story about them… But th...