Yes gem, I am surprised too of the similarities between the sons of Cain and the sons of Seth. They seems to tell the story of what happened during Cain and Abel's time so that generations after them will be reminded.
Thanks gem, I have not read Craig Paardekooper's Ebook and I am not able to open the link but I will search through the net.
This reminds me of something in Craig Paardekooper's Ebook- Enoch: An Essay on Angels- Have you read it?
This thread tells about it.
Enoch : an essay on angels
Many Blessings and Merry Christmas.
Ask and You shall receive,
Seek and You shall find,
Knock and the door will be open unto You.