The First Book of Adam and Eve, is part of a book entitled 'The Conflict of Adam and Eve with Satan'; a sixth century work. The original language was Ge'ez, which is an ancient South Semitic language. It is a Christian extracanonical work; a piece of apocryphal literature which tells of the life of Adam and Eve after they were expelled from Eden, and sent to live in the Cave of Treasures.
It then follows their time up until the point that Cain kills his brother Abel. Inbetween, it has the story of Adam and Eve's temptations, their trials, their visions of Satan, and the birth of their children. Considered pseudepigraphic, it is nonetheless an important piece of work, having survived many centuries. This is taken from Platt's work The Forgotten Books of Eden.