Book excerpt: In the 1990s alone, more than 400 works on angels were published, adding to an already burgeoning genre. Throughout the centuries angels have been featured in, among others, theological works on scripture; studies in comparative religions; works on art, architecture and music; philological studies; philosophical, sociological, anthropological, archeological and psychological works; and even a psychoanalytical study of the implications that our understanding of angels has for our understanding of sexual differences. This bibliography lists 4,355 works alphabetically by author. Each entry contains a source for the reference, often a Library of Congress call number followed by the name of a university that holds the work. More than 750 of the entries are annotated. Extensive indexes to names, subjects and centuries provide further utility.