The Conflict of the Ages book series was written by American religious author Ellen G. White (1827-1915).
The books follow the Biblical history of the world, with special focus on the conflict between God and Satan. The series starts with the pre-creation rebellion of Satan in Heaven, then moves on to the creation of the earth, the fall of Adam and Eve into sin, the Old Testament, the birth and ministry of Jesus until His ascension, then the early Christian church, the Dark Ages, the Protestant reformation, the last days of earth's history, the second coming of Christ, the millennium, and the destruction of sin and finally the recreation of earth and God's kingdom with man for eternity. This progression explains in detail the SDA understanding of the conflict between God and Satan and their understanding of the Bible and much of world history.