M. b. Yüsuf as-Sanusi (d. 895/ 1490) is one of the most important representatives of late kalam, and from his own lifetime his works became the most commonly taught manuals on this subject in African Islam. This thesis (viii and 286 pp., and 27 pp. of Arabic text) has three chapters. The first contains a detailed study of his life and times and an analytical list of his works. The second chapter is an edition and translation of al-`Agida al-wusta, exclusive of the commentary, based on 24 manuscripts selected from 58, which amount to three roughly distinguishable main traditions. The author maintains that al-`Agida al-wustä with its commentary represents as-Sanüsi's most original and synthetic indepth presentation of Muslim theology. The third chapter is a resume of the commentary with reference numbers on the top of each page to the corresponding section of the text in Chapter I. Included with the resume is anything additional or -corrective found in as-Sanusi's other works, so as to present his complete theological thought and its `development of position on. various questions, .