Question: What book was the 50th Speaker of the United States House of Representatives mentioned in? 
Sentence (from "The Unwinding"): "The Unwinding" includes lengthy profiles of five subjects: a Youngstown, Ohio factory worker turned community organizer, a biodiesel entrepreneur from North Carolina, a Washington lobbyist and Congressional staffer, the Silicon Valley entrepreneur Peter Thiel, and people involved in the distressed housing market in Tampa, Florida.
Relevant evidence: Yes