Robert A. Caro, "The Years of Lyndon Johnson, Means of Ascent," Alfred A. Knopf publisher.
This is one of a trilogy (I think it is). Incredible historical reporting. Portrait of a deeply
flawed individual who played the political power game with incredible skill and ruthlessness,
and sometimes gave in to his better angels, but not often. Treated his wife and political
opponents like crap. Etc. Superbly well written.
Next up, "The Way of the Knife," by Mark Mazzetti, about the inner workings of the CIA.
Sampled a chapter or two, another excellent history and analysis.
Neither book builds trust in humankind.