The Book of Jubilees (Hebrew: Sefer haYovelim), sometimes called the Lesser Genesis (Leptogenesis), is an ancient Jewish religious work, considered one of the Pseudepigrapha by most Roman Catholic, Eastern Orthodox and Protestant Christians. It was well known to Early Christian writers in the East and the West. 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 (Ge'ez: Mets'hafe Kufale). 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. Content Jubilees covers much of the same ground as Genesis, but often with additional detail, and addressing Moses in the second person as the entire history of creation, and of Israel up to that point...