The book "Introduction to the history of religions. A guide to the history of religions. Volume IV" by Crawford Howell Toy is a study of the world's religious systems through the prism of their historical development. The author examines both unique and common features of various religions, highlights their origin, development and influence on society. Using the analysis of texts, rituals, symbols and historical events, the author reveals the essence of religious beliefs and practices in different cultures and eras. This book is an important source for understanding the religious history and cultural context of different civilizations.