The volume throws light on the custom and customary laws of the Nyishi tribe of Arunachal Pradesh. It covers the origin of customs and customary laws and the changes in the customary laws over time, the institution of authorities, different types of village councils and rituals in the tribe. It takes up processes and methods of collection of evidence for administration of justice via oaths and ordeals in the tribe and nature of penalty and compensation for different types of offences. The well-researched study also discusses how the tribal people perceive their laws and the role of the modern political leaders in their midst.