Question: What book was the 50th Speaker of the United States House of Representatives mentioned in? 
Sentence (from "Newt Gingrich"): Newton Leroy Gingrich ( ; born Newton Leroy McPherson; June 17, 1943) is an American politician and author from the state of Georgia who served as the 50th Speaker of the United States House of Representatives from 1995 to 1999.
Relevant evidence: Yes