The first section of the book was extremely interesting. The early Mormon conflict with evolution was quite unique. Apparently, Mormonism promises that its adherents will become Gods (like the Heavenly Father) in the here after. This promise of Godhood is premised on an argument that Adam was a God just like the Heavenly Father. (Brigham Young apparently even toyed with the idea that Adam was God, and that Eve was one of God's many wives.)
Now hear it, O inhabitants of the earth, Jew and Gentile, Saint and sinner! When our father Adam came into the garden of Eden, he came into it with a celestial body, and brought Eve, one of his wives, with him. He helped to make and organize this world. He is MICHAEL, the Archangel, the ANCIENT OF DAYS! about whom holy men have written and spoken--HE is our FATHER and our GOD, and the only God with whom WE have to do." (Brigham Young's 1852 sermon).
In this metaphysics, the Godhood that Joseph Smith promises his adherents is a direct result of humans descending from an Adam-God. Achealogy, genetics and other science that put humans in the primate family is a direct challenge to the genealogy that makes Mormons direct descendants of God. DNA results that refute the claim of the American Indians puts the Mormon theology of man descending from God in further conflict with science and evolution.
Now, I really don't think that this fantasy is the driving force behind most Mormon's faith. My guess is that most Mormons are attracted to the social structure.
I can see why, if someone held that they were a descendant of God and will become a multiwived-Heavenly-Father themselves, that evolution would be troublesome. The theory of evolution and genetics breaks the genealogy that serves as the foundation for such a belief.
The genetic code, the fossil record, our physiology and outward appearance puts us firmly in the primate family. Evolution does not really explain why humans reason and browse the internet while other creatures on this earth do not.
It was not until reading Mormonism and Evolution that I actually caught on to this unique under current of the Utah debate on evolution. I have to admit here, Evolution directly counters the speculation that the Heavenly Father (aka, Adam, aka The Archangel Micheal) came to earth with one of his wives Eve to spawn a separate species of whitesome and delightsome Godlets.
For that matter, I think the main current impulse for the Utah action is the simple human tendency for people to inject their philosophies into science (especially the science of evolution). Great example of people injecting philosophical nonsense into science are "modern" theories like Nazism. The National Socialists were pushing a view that an Aryan super race had evolved and that, to achieve its full glory, this highly evolved super race had to wipe out substandard races like Blacks and Jews. I've read a few things under the guise of Evolutionary Psychology that appeared to me to be little more than a new manifestation of the Material Dialectic.
Anyway, apparently Mormons are currently in a dialog on how they should deal with wild speculations made by their founders.
The actual study of geology, archaeology, genetics is so much more interesting than the weird things that philosophical or theological thinkers have tried to inject into the debate. I really hope that LDS students really aren't being confronted with the decision of choosing between good science and a fantasy that they are in fact Gods in training.