Just finished it. Absolutely fantastic. I have to admit I was skeptical about the premise--I was afraid it was going to be a simple story along the lines of "we attempted to recreate the ancestor of our species and it turned out to be a horrible monster," but the story was not only much more compelling than that, it turned out to be really really scientifically interesting. Mea Culpa, FDO, I should never have doubted your dedication to hard scifi.
And of course all the usual good stuff about a Sigler novel was there--the characters are fantastic, and you get sucked right in. First book of yours I've read on paper rather than listened to, and I was amazed at how long it was--more than 400 pages!--yet it went by faster than a novel a quarter as long.
Loved, LOVED Magnus. In many ways he was more malevolent, more frightening than the ancestors!
I only wish I could have been a Junkie back in 2005, 2007 so I could compare this version with that one.
I'm sorry you didn't meet your goal; you've still got two books left with Crown so I think you'll be able to make it happen with at least one of them!