I had read Days of Peleg with great enjoyment, and I was worried what Jon would be able to do with before the flood, because there is so much less information available, even for someone who digs as deep as he does. My worries were groundless. Jon has several very interesting ideas about what the antedeluvian world might have been like, the Semyaz being the most important. I know of no other author who writes historical fiction that presents our ancestors as capable, intelligent, and educated. The novel has a solid grounding in Genesis, and the speculations are really fun. Bravo.