A book that talks about how to preserve languages, such as native American tribal languages, that are a part of the heritage but which are threatened because the only people who speak them are getting older and there is little written or audio material. One-on-one mentoring approach where you immerse yourself in the language and devote 20+ hours a week doing tasks together with your mentor (cooking, gardening, rituals, etc.) Excellent.
I learned from this....believe it or not!!!!!!!!!!!!