I can't tell if this is a textbook. If it is, it's interesting. If not, well, it reads like a textbook.
Interesting hypothesis, that Japanese emigrants crossed the Pacific, landed in California, and eventually made their way to where Zuni people lived 700 years ago.
I'm not an anthropologist, so it was very interesting to me how the science of anthropology uses logic. I'm impressed by how many fields they need to understand, e.g. dental morphology, linguistics, history of Asian migrations, etc. Much of that was new to me, so I enjoyed reading those parts.
I was left with two big questions: Why aren't there more traces of Japanese migrants between the California coast and the Southwest? And why did the Japanese choose the trans-Pacific route?
This is a book which I skimmed in places because I have other things to read that are a higher priority to me than details of Zuni syntax. If you are, than this is the book you've been waiting for! But even if you aren't, it's worth siting down with for a while.