The Sound Traditions: Studies in Ismaili Texts and Thought is a collection of Ismail K. Poonawala’s articles on Ismaili studies. Divided into three sections, the volume consists of nineteen articles that have been published over a long period of more than forty years. Part One focuses on Ismaili sources and the question of their authorship. The aspects of Ismaili rational discourses are examined in Part Two. Focusing on the scriptural knowledge of Ismaili tradition, Part Three then delves into investigating al-Qāḍī al-Nuʿmān’s life and contribution. This volume is an excellent gateway to the study of origins and development of Ismaili thought.