THE DEADLY DISC By Robert Besteman A MATT HARPER/ELM RIDGE MYSTERY P.I. Matt Harper thinks he's landed a 'vacation' case: Simply find out why a man drowned in a Texas lake, then meet with his employer in New Orleans. Sounds like a fishing trip, maybe even Mardi Gras. But he soon learns he's dealing with a devious ex-senator, a murderous drug cartel, a fiery Southern preacher, a charity trying to feed the masses in Africa, an organized crime boss, an international assassin. . . . And at the core of it all is a small silver computer disc.