Want to be a political journalist or biographical historian? Forget graduate or journalism school. Read Robert Caro’s "Working: Researching, Interviewing, Writing." Caro, a Pulitzer Prize-winning author and recipient of so many other prestigious awards, got them for superb investigative reporting on brilliant, ruthless men. The books include "The Power Broker" about Robert Moses – “the greatest builder in the history of America, perhaps in the history of the world” – and "The Passage of Power,"