This book describes when, why, and how mankind created their gods. It's an effort to light a candle in the darkest corner of human consciousness.
After learning language, mankind recognized many powers around them, which were beyond their control but could harm or help them. People began to worship those powers. For example, during the last Ice Age, people recognized the Sun as their savior, which was beyond their control. After this knowledge, mankind initiated worship of the Sun.
There is enough evidence to assert that the ancestors of Hindus, Buddhists, Jews, Christians, and Muslims worshipped the Sun before their religions came into practice. People learnt the solar worship in the similar way they learnt to make tools, to ignite fire, to speak language, and many more things.
Around three thousand years ago, mankind suffered new diseases, poverty, exploitation, crime, and injustice. Visionaries of those ages, such as the Buddha, Moses, Zoroaster, and Jesus, endeavoured to explain and eradicate human miseries. They visualized several gods and demons behind human sufferings. They propagated many morals and methods of worship to eradicate the sufferings.
After their death, priests documented their teachings as holy books such as the Bible, the Avesta, etc. Priests propagated the allegories mentioned in these scriptures as history. Thus, the ancient scriptures fashioned organized religions of the world.