The Red Queen - named after a theory which is itself named for the 'Alice' character, who must run as fast as she can simply to keep pace with the world around her - fascinated from beginning to end. Looking at the evolution of sex, it is filled with intriguing facts, remarkable examples, and frequently alarming revelations. From why the peacock has that remarkable tail (it's probably to do with sexy sons) to why polygamy benefits females rather than males, the book is a real eye-opener. Once you've learned the secret of the lek, the local disco will never seem the same again. And, given that a man's testicular size is evidence that neither he nor his partner evolved for true monogamy, you may not find this book terribly reassuring. Polygyny, polyandry, incest, infanticide, and group-bonking bonobos: it may leave you thinking that, in comparison to even some of our closest relatives, we humans have very conservative sex lives indeed. And we may only have started doing it at all so that we don't fall prey to parasites! A great read, and real incentive to read anything else available by Matt Ridley.