To clarify seeing as the thread has two answers, both different, ThreeFry is a 1 on 1 and is in the book TOoC. ThreeFry from the book has an ending which changes all 3 coins to copper and the 1 on 1 does not.
Edit: ThreeFly is called Menage Et Trois (at least Chris's version is called such which I beleive Katie performed in the Media section and called it ThreeFly though it is Menage Et Trois) which is in Chris's book TOoC as well as ThreeFry.