Read “Plain Speaking” by Merle Miller.
Outstanding book of interviews of Harry Truman. He was so down to Earth he didn’t seem like a politician.
Miller’s book on Truman is mostly fake:
http://www.americanheritage.com/content/plain-faking
“Plain Faking?
In the classic “oral biography” of Harry Truman, many of the President’s most trenchant words may simply have been invented”