Eli Bendersky's website (co-authored by Carl Sagan and Ann Druyan)
"If it ain't broken, don't fix it" they say. Well it applies to books too - if you really like books by some author, just keep reading more of them cause chances are high you'll like the new ones too. Well, not always. But at least it's so with Sagan's books.
"Shadows of forgotten ancestors" is another excellent book, an eye-opening read that swirls you through scientific facts and theories as if those were soap operas. Such is Sagan's gift.
In this book, the emphasis is on the genetic ancestors of us, Homo Sapiens. How we became what we are, how we evolved from apes (and before that, from mammals, etc) and how different we *really* are from them. I read another book on this subject not so long ago (The moral animal) but that one was solely about the evolved psychology. Sagan's book talks a lot about psychology, but also quite a lot about other, more physical things. In general, it spends quite a lot of time explaining the theory of evolution, providing numerous examples from the flora and the fauna of ancient and current times.
The accounts of chimp behavior and of the various brilliant experiments done on chimps to test them in "human" environments and challenges are flabbergasting. I doubt that any reader with a scientific head can remain in doubts about our ancestry after reading this.
All in all, another excellent work by Carl Sagan (co-authored with his wife Ann Druyan). Highly recommented.