He is coauthor, with James H. Brown, of Biogeography. Dov F. Sax is a research biologist and lecturer at the University of California, Santa Barbara, and secretary of the International Biogeography Society. James H. Brown is a Distinguished Professor of Biology at the University of New Mexico, and past president of the International Biogeography Society. He is author of Macroecology, also published by the University of Chicago Press.