God wrote a Book as well. More specifically, God, through man, wrote a Book. No book, in history, comes close to THE BOOK. THE BIBLE. It was written is such a way that only the Children of God would find TRUTH. (those whom have been given eyes to see and ears to hear).
While, the Children of the serpent/satan would NOT find the TRUTH. They would read, read, and read some more. They would write books upon books TRANSLATING the WORD. Meanwhile, there it is in the BIBLE: led no man add, or subtract, from these words.
You say the same about Sun Tzu's Art of War. It's not longer a secret you scream. But it is a secret to you, you have no clue what Sun Tzu's words say. Why? Maybe because you have eyes and ears which can not see or hear.