2010 Reprint of 1917 Edition. The Book of Jubilees, sometimes called the Lesser Genesis, is an ancient Jewish religious text. It was well known to Early Christian writers in the East and the West, as well as by the Hebrews. Later it was so thoroughly suppressed that no complete Hebrew, Greek or Latin version has survived. It is considered canonical for the Ethiopian Orthodox Church, where it is known as the Book of Division. In the modern scholarly view, it reworks material found in the biblical books of Genesis and Exodus in the light of concerns of some 2nd century BC Jews. The Book of Jubilees claims to present "the history of the division of the days of the Law, of the events of the years, the year-weeks, and the jubilees of the world" as secretly revealed to Moses (in addition to the Torah or "Instruction") by Angels while Moses was on Mount Sinai for forty days and forty nights. The chronology given in Jubilees is based on multiples of seven; the jubilees are periods of 49 years, seven 'year-weeks', into which all of time has been divided. According to the author of Jubilees, all proper customs that mankind should follow are determined by God's decree.