Full of data, wrapped around the inspiring story of Shetland immigrant to Spences Bridge, BC, James Teit, early in the 20th century. A farmer, big game hunter and guide, he came naturally to the (newish) discipline of cultural anthropology and the role of field ethnologist. He befriended, and ended up advocate for, the Interior Salish and Tahltan, and all of BC's First Nations over treaty rights.
I've also read Wendy Wickwire's At the Bridge: James Teit and an Anthropology of Belonging. They complement each other, but Thompson's book has the deluxe coffee table layout with beautiful plates, and Teit's portraits of his BC friends and informants.