There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
Epic of Gilgamesh
The Epic of Gilgamesh is, perhaps, the oldest written story on Earth. It comes to us from Ancient Sumeria, and was originally written on 12 clay tablets in cunieform script. It is about the adventures of the historical King of Uruk (somewhere between 2750 and 2500 BCE).
The Dead Sea Scrolls: Book of Giants
It is fair to say that the patriarch Enoch was as well known to the ancients as he is obscure to modern Bible readers. Besides giving his age (365 years), the book of Genesis says of him only that he “walked with God,” and afterward “he was not, because God had taken him” (Gen. 5:24). This exalted way of life and mysterious demise made Enoch into a figure of considerable fascination, and a cycle of legends grew up around him.
Many of the legends about Enoch were collected already in ancient times in several long anthologies. The most important such anthology, and the oldest, is known simply as The Book of Enoch, comprising over one hundred chapters. It still survives in its entirety (although only in the Ethiopic language) and forms an important source for the thought of Judaism in the last few centuries B.C.E. Significantly, the remnants of several almost complete copies of The Book of Enoch in Aramaic were found among the Dead Sea Scrolls, and it is clear that whoever collected the scrolls considered it a vitally important text. All but one of the five major components of the Ethiopic anthology have turned up among the scrolls. But even more intriguing is the fact that additional, previously unknown or little-known texts about Enoch were discovered at Qumran. The most important of these is The Book of Giants.
Book of Enoch
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.
The Book of Enoch, Section I
From-The Apocrypha and Pseudepigrapha of the Old Testament H.R. Charles Oxford: The Clarendon Press
THE FORGOTTEN BOOKS OF EDEN
— The First Book of Adam and Eve – http://www.sacred-texts.com/bib/fbe/fbe005.htm
The version which we give here is the work of unknown Egyptians (the lack of historical allusion makes it impossible to date the writing). Parts of this version are found in the Talmud, the Koran, and elsewhere, showing what a vital rôle it played in the original literature of human wisdom.
— The First Book of Adam and Eve – http://earth-history.com/Pseudepigrapha/FB-Eden/adam-eve-1.htm
— The second Book of Adam and Eve VOLUME 2 – http://earth-history.com/Pseudepigrapha/FB-Eden/adam-eve-2.htm