The Worldmark Encyclopedia of Religious Practices has three volumes. Volume I includes essays on the history beliefs, and contemporary practices of 13 major faith groups African Traditional Religions, Bahai, Buddhism, Christianity, Confucianism, Hinduism, Islam, Jainism, Judaism, Shinto, Sikhism, Taoism and Zoroastrianism and 28 of their subgroups, such as Anglicanism, Reform Judaism, Mahayana Buddhism, and Vaishnavism.