Phoenix Rising
For a popular treatment of the system in specific relation to the tarot see Faith Javane and Dusty Bunker, Numerology and the Divine Triangle
Yes I have this book. She uses the Pythagorean Method of numerology, I actually think she mentioned that Pythagoras was one of her teacher guides. I have 4 of her books.
Although Chaldean and Pythagorean are very different to each other. So which one do you choose?