Conversation so far:
What was Newt’s involvement with the Welfare reform?
As House Speaker, Gingrich oversaw passage by the House of welfare reform.
What is Newt Gingrich’s political affiliation?
He is a member of the Republican Party.
Was Habitat for Humanity successful?
Newt praised Habitat for Humanity for sparking the movement to improve people's lives by helping them build their own homes.
Are there any other interesting aspects about this article about Newt Gingrich?
Space exploration has been an additional interest of Gingrich since a fascination with the United States/Soviet Union Space Race started in his teenage years.

Question: Did he sell a lot of copies?
Self-contained rewrite: Did Newt Gingrich sell a lot of copies of his books?