Sherrill and Chu, “An anthology of I Ching”
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This book has the ability to introduce the reader into the numerology and the cosmology of ancient China. I would suggest it to anyone interested in widening his/her knowledge on the intricacies of hexagram and line relations with the metaphysical word elaborated in ancient China.

Additional Bibliography
These books have reference to the Najia method or Chinese numerology and cosmology related to the interpretation on the I Ching hexagram devoid of the traditional commentaries.

The following books are not directly related to Najia method, but are relevant to hexagram study without commentaries.
This is the best archive on Yi Jing resources and publications available
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Please carry on you own studies using this database; it is continuously updated and contains brief commentary for each entry.





Alfred Huang, “The Numerology of the I Ching"
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Although this book was not written as an autonomous opera, but rather as companion volume to Huang's translation “The Complete I Ching”, it can be read on its own as an introduction to several numerological and philosophical concepts at the base of Najia system.