The association of Dan and Adam is made in the on-line Tutorials. It's not part of the book itself.
The Zodiac signs of the 12 tribes are touched upon in the tutorials and summarized in Chart 2:
We've had some discussion on the Zodiac. You should be able to find it using the search function. Multiple systems were evidently in use in ancient times.
The connection between Sidon and Poseidon was left to the reader to make in the latest essay.
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