The story of Adam and Eve in Genesis is brief — 3 chapters covering creation, temptation, fall, and expulsion. The Book of Jubilees expands this story significantly, adding details that ancient readers found both plausible and illuminating.
According to Jubilees, Adam and Eve were created in the Garden of Eden but did not enter it immediately. They spent their first weeks in a separate location — perhaps the land outside the Garden — before God brought them in. Jubilees uses this detail to establish a purity law: a woman is not immediately pure after childbirth, and the time elapsed before Adam and Eve entered the Garden corresponds to the purification periods described in Leviticus. This is typical of Jubilees' method: connecting the primordial stories to the later Mosaic law, showing that the law isn't an innovation but a pattern built into creation itself.
Jubilees also provides specific timelines. Adam was created on the first day of the first month. He was placed in the Garden on the fortieth day (for a male, reflecting the Levitical purification period). Eve was brought to Adam on the eightieth day. They were expelled after violating the prohibition on eating the fruit.
The serpent in Jubilees is not Satan — it's a serpent who speaks because the animals could still talk before the fall. The fall itself changes the animals: they become unable to communicate with humans, and the serpent loses its tongue (some translations say its ability to speak) as a specific punishment.
These details may or may not convince you. But they show an ancient reader's careful, reverent engagement with the text — an attempt to understand every detail and find in it theological meaning.