Demons are an integral part of society in general and Hinduism in particular. The Principle of Complementarity emphasizes that both devas and demons must coexist.

This book vividly illustrates the various types of demons—both external and internal—why and how they were created, and why and how they had to be eliminated.

Additionally, the book discusses demons eliminated by Ganesh, Indra, and others while explaining the Kalpa-bheda hypothesis.

The Western perspective holds that God creates demons against His will, whereas Hinduism considers that God creates demons willingly and out of necessity.

The book provides a detailed classification of different demons, exploring their sources, origins, and distinctions, as well as their various abodes and the celestial wars between devas and demons.

It highlights the roles of demons within Hinduism and beyond, examines gods (devas) and demons in their microcosmic aspects, and explores the three stages of alignment between devas, demons, and humans.