I enjoy reading Zimmer.

I did not care for his explanation of speciation in Chapter 9, it did not satisfy me but the rest of the book was great. His example of the bald eagle in speciation barriers seemed lame to me. I wanted a better definition for species, but maybe the quote from Darwin was the best "I look at the term 'species' as one arbitrarily given, for the sake of convenience, to a set of individuals closely resembling each other."

An excellent overview of evolutionary biology from one of the best contemporary science writers. I would (and indeed do) recommend this as an excellent option for a text for any introduction to evolution type of class for undergraduates, especially non-biology majors. Amid the various popular books on evolution published during Darwin's bicentennial year, this one stands out, in part because it is not as polemical as, say Dawkins' or Coyne's books.