I just recently bought a book entitled "The Silmerillian".
It is a book by: J.R.R Tolkien about Eru and the Ainur, and all of the children of Eru. It pre-dates Middle-Earth and tells you how the lands of Middle-Earth came to be. J.R.R rote about how Melkor, one of the Valor, became jealeous of the others and let rage grow withing himself. Melkor turned evil and thus began the great wars of old. Sure enough after Melkor had perished, Sauron became the ruler of evil.



I strongly recommend this book to anyone who is really interested in the history of Middle-Earth.