Frank Gregorsky has web-published a draft book chapter in pdf form. Based on his working with Newt Gingrich during 1978-83 and again in 1993-94, he distills Gingrich's method of operation and contends that it has never changed. You'll find nothing about religion or marital status -- instead, the profile is of a lifelong "political animal" who moves faster than he thinks. Pages 37 to 41 are a very helpful list of sources.
[cross-posted from Bessette-Pitney Text]