Umbrella Man — Doug J. Swanson

Poor Jack Flippo. It's just his luck to stumble across a guy like Marty Dufrain--a big talker who claims to be in possession of a few black-and-white frames of history. The grassy knoll, the motorcade, the Book Depository. And something more. Someth that could feed every crackpot's crackpot theory, throw every conspiracy buff into convulsions, and send PI Jack Flippo running for his life. And this time, paranoia may be the only thing that can save him...