Almost lost over the centuries, the Book of Jubilees was retrieved from the Ethiopic language and was recently found among the Dead Sea Scrolls. The Book of Jubilees is also called the Little Genesis, Book of Divisions and the Apocalypse of Moses. It repeats the events of Genesis and Exodus, from Creation to the exodus of the Children of Israel from Egypt. It recounts the events in sets of jubilees (sets of 49 years) and gives additional details on the fall of the angels and the creation and destruction of the Nephilim. It also mentions the three classes of pre-flood Nephilim. It details the fact that one-tenth of their disembodied spirits would remain on Earth as demons to tempt people and nine-tenths would be chained until the Tribulation Period.