Title = America's God: From Jonathan Edwards to Abraham Lincoln
Author = Mark Noll
Description = not a true individual biography, but rather the story of the development of evangelicalism in the U.S. Same story… big, but less than 450 pp of text.

http://www.amazon.com/Americas-God-Jonathan-Edwards-Abraham/dp/0195182995/ref=sr_1_1?ie=UTF8&s=books&qid=1244286700&sr=1-1