secret codes in the Bible

     People have claimed to find secret codes and hidden messages in the Bible--including instructions to commit crimes.  This is something worse than clever nonsense. They didn't "find" any messages in the Bible, or in any other book--they put them there. Any book can be used to send a message in "secret code". The recipient of the message would only need a copy of the same book the sender used.. The books would have to be exactly the same-- the Bible, which has been printed so many times, would be more difficult to match in this way than any other book. The sender of the message could use the words or the letters in the book--each letter could be numbered, in order, or each word. The numbers could be sent as a "coded" message. The person who received the message could use the book to "decode" the message--no supernatural agency required.