This book delivers the first truly comprehensive exploration of Ibāḍī law, shining a spotlight on a legal tradition long left in the shadows of Islamic studies. By following Ibāḍī sources from their earliest beginnings to the 20th century, it reveals a dynamic madhhab that shaped debates across regions and eras. What makes this study groundbreaking is its bold, integrative approach: it offers a path beyond the dominant Sunni‑centric (and secondarily Shiʿi‑centric) narratives on Islam, adopting an approach that considers Ibāḍī, Sunni, and Shiʿi perspectives as equally vital to reconstructing Islam’s legal history. This shift breaks open the field, offering a fresh, compelling way to read the formative centuries of Islamic law and its remarkable diversity.