A.J. Wensinck (1882–1939) here offers an English translation of the long work of the very influential monastic author Isaac of Nineveh (late 7th cent.). There are a total of 82 chapters from Isaac given here, all based on Bedjan’s Syriac text (also available form Gorgias Press). Wensinck turns Isaac’s difficult Syriac into clear, readable English prose, and his translation remains a foundational resource for anyone studying this kind of literature. An introduction( 40 pages) covers the Syriac text (its manuscripts and versions in other languages), Isaac of Nineveh himself, and his thought and its place in his intellectual context. A general and scriptural index conclude the book. Historians of religion and mysticism, not to mention students and scholars of Syriac literature and church history, will welcome the reappearance of this significant work.