The book titled A Commentary on the Customary Law of the Sama Banguinguih of Simariki Island, authored by former National Commission on Muslim Filipinos (NCMF) Yusuf Morales, is a timely contribution to the very scarce literature dealing with the Sama tribe. This monograph provides the reader with an interesting glimpse into the practices and traditions of the Sama Banguinguih, showcasing the richness of their culture, especially in the domain of indigenous knowledge, adat (customary law), and Islamic Law.