The Book of Enoch written during the second century B.C.E. is one of the most important non-canonical apocryphal works and probably had a huge influence on early Christian particularly Gnostic beliefs. Filled with hallucinatory visions of heaven and hell angels and devils Enoch introduced concepts such as fallen angels the appearance of a Messiah Resurrection a Final Judgement and a Heavenly Kingdom on Earth. Interspersed with this material are quasi-scientific digressions on calendrical systems geography cosmology astronomy and meteorology.