After reading The Da Vinci Code, I was interested in reading the other Dan Brown books. This book was written before The Da Vinci Code and has the same lead character. I don’t think the book was as good as The Da Vinci Code, but Brown shines the light on some religious facts/information that I was not aware of. These points, if true, give an insider view of the Vatican and provide a good tapestry for the story to build upon.
I would recommend this book, but if time was limited I would read The Da Vinci Code first.