The Book of Enoch is an ancient Jewish religious work, traditionally ascribed to Enoch, the great-grandfather of Noah. It is not part of the biblical canon as used by Jews, apart from Beta Israel. It is regarded as canonical by the Ethiopian Orthodox Tewahedo Church and Eritrean Orthodox Tewahedo Church, but no other Christian group. Estimated to have been written around 300 BC, this ancient Jewish religious work is ascribed by tradition to Enoch. The book follows Enoch as he travels through Heaven and expands more thoroughly, than the Book of Genesis, on the early kingdom of Israel and the events leading up to the great flood of Noah. With evil everywhere around, the Apocalyptists saw no hope for the world as it was, it must be destroyed if the good were ever to triumph.