Paul O’Connor, student of history, takes a look at a new book about one of the most reviled characters in America’s past. Reviewed by Paul T. O’Connor VALIANT AMBITION: GEORGE WASHINGTON, BENEDICT ARNOLD AND THE FATE OF THE AMERICAN REVOLUTION. By Nathaniel Philbrick. Read by Scott Brick. Penguin Audio. 13 hours, 30 minutes. $45. Also available…