This atlas is in name only. The better maps are the distribution of Catholic and Christians during the Reformation and a map of the Buddhist World from the 1st to the 9th Century. Most maps are simplistic and hardly worthwhile.
The text resembles encyclopedia articles, factual but boring. The religions are Christianity, Islam, Hinduism, Buddhism and Judaism-- as well as lost ancient religions (including ancient Greece and Rome), shamanism, Amerindian religions, traditional African religions, Shinto, Jainism, Sikhism, Zoroastrianism and others. These minor religions might be the main value of this book.
Most of the 14 authors are academics with a "world reputation". The appendix has a useful 23 page chronology of important events under each religion. With subject index and proper names index.