and criticizes the idea of a mental module for mate-selection. The volume closes with two essays about animal minds, which explore current research on animal consciousness and language acquisition. The essays cover a diverse array of interconnected topics. Though each essay may be profitably read on its own, each is also nicely complemented by others in the volume. While the essays engage in a number of different arenas of debate, the most notable theme is perhaps the pluralist conception of classification, which is a useful corrective to the tendency to identify realism with commitment to uniqueness of classificatory scheme.