[Sensei Ern]

Check out books by Clarence Larkin:
http://en.m.wikipedia.org/wiki/Clarence_Larkin

He mostly drew charts and images based on biblical description. It helped me with a lot of insight into understanding Bible prophecy.

The only thing I found oddball was his ideas that the great pyramids were related to Bible prophecyand built by angels.

[Yosemitest]

Okay, there some books out from the "Knights of Templar" that have some interesting drawings in them, and some of their symbols are still very prevalent today.
But as far as religion is concerned, the Bible is my main source.
I like an author that quotes his sources, so you can go back to original source and verify his logic.

But most of the authors from the Catholic Church, and ALL the churches that spun out of "her", usually aren't worth my time.