The book "Introduction to Ethnography" discusses how indigenous people use plants for food, medicine, cultural customs, housing, fuel, and transportation. It discusses the evolution of ethnobotany and the formation of this field over the years. Ethnobotany is described as the study of the connection between people in their indigenous societies and their plant ecosystem. This book aims to study culturally based biological and environmental understanding, cultural perception and perception of the natural world, including related behaviors and activities. It also mentions the naming and classification process of plants by community members, and points out that different communities may use the same plants in different ways.