Book reviewed in this article:Hair of West‐European Mammals. Atlas and Identification Key, by B. J. Teerink.Koobi Fora Research Project, Vol. 3, The Fossil Ungulates: Geology, Fossil Artiodactyls, and Palaeoenvironments, edited by J. M. HarrisBiomechanics in Evolution (Society for Experimental Biology Series No. 36), edited by J. M. V. Rayner and R. J. Wooton.Efficiency and Economy in Animal Physiology, edited by R. W. Blak