By Gwendolyn Dawson The Finkler Question, Howard Jacobson’s latest novel and the winner of the 2010 Man Booker Prize, is an exploration of love, death, grief, friendship, and what it means to be Jewish in contemporary London.  At the novel’s beginning, Julian Treslove is mugged after leaving a dinner party with his two best friends, Sam Finkler and Libor Sevick.  …