This work is devoted to the five Syriac Apocryphal Psalms. These Psalms include Psalm 151, known from the Septuagint, as well as two Psalms also found in a Hebrew version in a Psalm Scroll from Qumran. These psalms are studied in their relation to the Hebrew and Greek originals. The study includes material from unpublished Syriac manuscripts. This book is intended for specialists in Old Testament Studies, Syriac, Semitics, and Patristics.