"In the beginning was the Word, and the Word was with God, and the Word was God."
Christ did leave us a book.
I'm not unaware of John 1:1. But I'm still not understanding you. It sounds like you are saying either that Christ Himself wrote the NT, or that Christ (i.e. the Word) did not ascend into heaven. Are you saying either of those, or are you saying something else?
-A8