1926. The present study on Fallen Angels is reprinted with revision and additions from the "Jewish Quarterly Review." This is the first exhaustive study of the subject which has been made in this department of research and the book contains some important excursions into by-paths of the main subject. In order to fit himself for this study and not be obliged to rely upon secondhand material, the author went to the trouble of studying Persian and Anglo-Saxon, and indication of the thoroughness of his method. Contents: nature of angels; two satans; satan; objection to the creation of man; fall of man; Ashmedai; fall of the angels.