Daniel Guillemette and The New York Times writer M. Gessen is widely known for their award-winning writing about totalitarianism, terrorism and the erosion of human rights. Now, M. is examining a more personal topic: their least favorite cousin, Allen. For decades, M. simply disliked Allen. They saw him as a fool, a pompous “international businessman” who bragged about shady deals and drove fancy cars. But when Allen is arrested for trying to put a hit out on his ex-wife, M.