I finished reading Terry Brennan's first novel Sacred Cipher last week.
This novel has a Christian message and focuses on a traditional good versus evil scenario. This novel offers a little bit of history lesson, a little bit of religion lesson, and a whole lot of mystery and intrigue. I read a lot of thriller-mystery-adventure novels and this book fits that category too. The author obviously put a lot of research into the book (at times maybe a little too much). There are sections of the book that do not flow well and are not easy to read, but I'll chalk that up to the author's attempt to "educate" the reader and provide a "framework" for the unfolding storyline.
If you like Dan Brown's Da Vinci Code, then Sacred Cipher is also a book you'll be interested in.