Can you recommend books like the da vinci code?

do you mean books that are based on history and are mysterious? Or do you mean books that are about uncovering the mysteries of God? (Which I don't think the davinci code did, it plainly said it had a lot of speculation in it). Have you read God's Fingerprint, or God's Signature? Both of these are based on the idea that the Bible has some hidden meaning in it. They are a little far fetched though, skipping every 36th letter and moving about in any direction. The Left Behind series is exceptional and if your looking for the Biblical "mysteries", then look into theomatics. There's a book called the Scientific Approach to Christianity which goes into detatil on theomatics, which is based on the principle that every letter is igned a number and things relating to each other, say for example only,that love, honor, self sacrific all add up to the same number. It's very interesting