Triplex Unity



Does anybody know anything about where one of the main taoist source books, "Triplex Unity" can be found? I have looked everywhere. Thomas cleary mentions it in a few of his books but I don't know where to find it. I don't even know if it exists anymore.
Namaste Bweaver,

thank you for the post.

yes, it does still exist, though it is hard to find. i found a copy in a used book store some years ago.. though it is not a great transliteration.

it is my understanding that Cleary is working on a new transliteration for the Triplex Unity (Ts'an t'ung ch'i) text at this very moment... well... perhaps not *this* very moment.. ;)

here's a link that you can view the Chinese and some translations of the work: