The Fly SwatterBy: Nicholas Dawidoff In The Fly Swatter, Nicholas Dawidoff bestselling author of The Catcher Was a Spy vividly reconstructs the life of his grandfather, Alexander Gerschenkron the Harvard professor who knew the most. A fascinating character, Gerschenkron feuded with Vladimir Nabokov and John Kenneth Galbraith, flirted with Marlene Dietrich, and played chess with Marcel Duchamp and one upped both Isiah Berlin and (allegedly) Ted Williams. At Harvard,