Recurring theories suggesting that God included secret messages throughout the Bible, that can be mathematically discerned...
And then there are the Wrong Codes...
(CONTRA) Surprising codes. On
Jochen Katz' site

Barry Simon on Torah Codes
(CONTRA) Simon is the IBM Professor of Mathematics and Theoretical Physics at Caltech
The Bible Code
(Contra) Prophetic Insight or Fertile Imagination? Article by
PFO
Bible Codes
(CONTRA) A
Messianic Jewish perspective. By Rich Robison. On the Jews for Jesus site.
Bible Codes? Or Matrix Of Deception?
and
part two. (CONTRA) By John Winston Moore. On the
SCP site
Cracking 'The Bible Code'
(CONTRA) Includes a letter from
James Randi regarding his own debunking of 'The Bible Code'
Cracking the Codes
(CONTRA) by Dr. Hugh Ross
Hidden Codes in the Bible: Hoax or Prophecy?
(CONTRA) Article on the site of the
Ontario Consultants on Religious Tolerance
Magic Apologetics
(CONTRA) by
Hank Hanegraaff
Mathematical Miracles in the Quran and the Bibles?

(CONTRA) Jochen Katz collected this extensive list of links on his
Answering Islam site
Moby Dick Codes
(CONTRA) Michael Drosnin told Newsweek: "When my critics find a message about the assassination of a prime minister encrypted in Moby Dick, I'll believe them." (Newsweek, Jun 9, 1997). Uhuh...