The good news on Robert A. Caro's long-awaited next book is that he knows the final words.
The bad news is that he's known them for years and remains far from concluding his Lyndon B. Johnson series. Caro, who also wrote “The Power Broker,” has published four volumes of “The Years of Lyndon Johnson” over a period of 40 years. Volume 4, “The Passage of Power,” came out in 2012.
