I read a lot of books on American History and I found "In God We Trusted" to be one of the most detailed and well researched books on the topic that I 've ever read. I enjoyed it so much that when I finished it, I went back and read it again.
Both times as I was reading the book I made extensive notes and underlined what I thought were important sections. As it turns out, on almost every page there's something that caught my attention. I now find myself referring to it regularly. If you're a serious student of American history or just want to understand the foundation that our country was built on, this is one that you'll want for your library.