Liz Kavanaugh, Edinburgh police inspector and heroine of "Rule 34," leads the Internet Crime Investigation Unit (ICIU) of the Lothian and Borders Police. The ICIU monitors the web for memes that trigger criminal behavior. Many such memes are pornographic, hence the title of the book. (Rule 34 is a tongue-in-cheek law of the Internet: if it exists, there is porn of it.)

Scientists at the Antwerp Zoo pitted two species of primate, the bonobo and the chimpanzee, against each other in a puzzle contest. The results surprised the scientists.

The bonobo and the chimpanzee are closely related species. Their habitats are separated by the Congo River. The animals are so similar the two species were not distinguished until the twentieth century.  The differences between the two species suggest some explantions for the results of the contest.