This is the third volume of Luzac's Oriental Religions Series. The theories discussed in this book are based on a study of that intricate demonology which has gradually developed throughout the lands of Western Asia. The study of tabu from the Assyrian side had been comparatively neglected and the evidence gleaned from the cuneiform writings shows that it existed in practically the same form in Mesopotamia as in other countries. The material the author could gather was imperfect and the relative scientific value of what was actually known on the subject is proportionate to the amount of evidence which may be afforded at some later date by documents in the British Museum that were not released for this book.