We can document the first Egyptians in the Nile River Valley at 3500 B.C. This is when Adam of Adam and Eve fame was merely middle aged, since he reportedly lived to be 930 years old.
And strangely enough, they had already completed the great pyramids of Giza before the 6010 year timeline allows for Noah's Flood. Somehow they managed to survive and flourish during the Flood and continue their amazing civilization.
I'm guessing there is no explanation for this in this book.
You must be interpreting the evidence incorrectly. At least that's what I've heard. But whenever I ask for this systematic, comprehensive, coherent, rigorous, extensive, and well documented alternative interpretation of the evidence, all I ever get are links to AiG and ICR where they're trying to sell books and DVDs in which all of this must be explained.
You would think that if these people have a valid alternative interpretation of all of the scientific evidence that would overturn a couple of hundred years of accumulated and converging scientific research, analysis, and theories in physics, chemistry, geology, paleontology, zoology, botany, comparative anatomy, biology, genetics, etc., they would have a better marketing strategy on how to make money off of it.
I think they're making plenty of money off of it. There's a ready audience out there willing to shell out money for anything which seems to confirm their belief.
They know their arguments aren't going to convince serious scientists. But winning the argument isn't even a part of the marketing strategy. It doesn't need to be.