In various scientific publications on the Vedic Scriptures we can read the opinion; the ancient authors of these texts are confused and they did not know the correct performance of the rituals, which they describe. But if we read these texts, then we see they correspond to each other. They have a basic agreement, but tell us on differences in the details of the rituals.. This speaks not of confusion, but of the existence of a different tradition. These ancient scholar know their rituals very well and we see in these texts a colourful picture of their historical past. We show in this Volume 1 an introduction to the Vedic Scriptures and the preliminary rituals of the ancient people, before the main ritual of worship and sacrifice take place. Volume 2-5 will show these rituals in all their aspects and in the way we find them described in the Vedic Scriptures. These texts are mainly manuals for the priests. We get exciting details and stories handed down to us.