I had a good look at this book. The cover, the printing details, feeling the paper. I read the cover page and several pages that followed. Finally I get my hands on it. Sent by one of the author that I know. We used to work together.
The introductory pages sets the tone. Although there is a good dose of thesis-feeling, which in these pages you could feel the "Definition of terms" and some sort of "Research limitations", it reads like a long-read curated article in a magazine. It reads like a feature story with a narrative style.
The authors were very careful not to step on anybody's toes, though it might be unavoidable in such situation. There is a strong sense of modesty and openness, but without compromising points and goals the authors were trying to achieve.
The begining of chapter one reminds me of "Dances with Wolves" movie, when one of the Indian elder hold the copper helmet of a Portuguese soldier, saying, "many more will come."
I have never been to Siberut. The furthest contact to tribal communities that I've made was buying a handmade tote bag on the street of Chiang Mai from one of several minority tribes (they have their own issues over there, BTW) after some haggling of course. So, being a pathethic Indonesian who has never set feet even on Baduy Luar area, I approach this book like a scientific reference. You should too, because this book was originated from a thesis of a graduate study of one of the author and not, definitely not, some backpacking or travel notes.