The authors have collaborated since 1989, coauthoring a number of research and review papers on speciation.Jerry A. Coyne is Professor in the Department of Ecology and Evolution at the University of Chicago. He earned his Ph.D. (Biology) at Harvard University, followed by an NIH Postdoctoral Fellowship in the Department of Genetics at the University of California, Davis. He has taught undergraduate and graduate courses spanning a wide range of topics, including evolutionary biology, speciation, genetic analysis, social issues and scientific knowledge, and scientific speaking andwriting. Dr. Coyne was awarded a Guggenheim fellowship in 1989. He has served as Vice President of the Society for the Study of Evolution (1996) and as Associate Editor of Evolution (1985-1988; 1994-2000) and The American Naturalist (1990-1993). His work is widely published, not only in scientific journals, but in suchmainstream venues as The New York Times, the Times Literary Supplement, and The New Republic.H. Allen Orr is Professor in the Department of Biology at the University of Rochester, where he has taught courses in evolution, quantitative and population genetics, evolutionary genetics, and speciation. He completed his Ph.D. in Ecology and Evolution at the University of Chicago and undertook postdoctoral study at the University of California, Davis. Dr. Orr was awarded both the Young Investigator Prize (American Society of Naturalists, 1992) and the Dobzhansky Prize(Society for the Study of Evolution, 1993). Other honors include the David and Lucile Packard Fellowship in Science and Engineering (1995-2000) and a Guggenheim fellowship (2000-2001). Dr. Orr has served on the editorial boards of Evolution (1998-2000) and Genetical Research (1996-present), authored or coauthored numerousarticles in scientific journals, and been a frequent contributor of book reviews and critical essays to such publications as The New York Review of Books, The New Yorker, and Boston Review.

Aimed at professional biologists, graduate students, and advanced undergraduates, Speciation covers both plants and animals (the first book on this subject to do so), and deals with all relevant areas of research, including biogeography, field work, systematics, theory, and genetic and molecular studies. It gives special emphasis to topics that are either controversial or the subject of active research, including sympatric speciation, reinforcement, the roleof hybridization in speciation, the search for genes causing reproductive isolation, and mounting evidence for the role of natural and sexual selection in the origin of species. The authors do not hesitate to take stands on these and other controversial issues. This critical and scholarly book will beinvaluable to researchers in evolutionary biology and is also ideal for a graduate-level course on speciation.

Coverage encompasses both plants and animals Fills a gap in the market by providing a unified, critical and uptodate overview of the field Gives special emphasis to topics that are either controversial or the subject of active research Its experienced authors have written for mainstream as well as scientific publications

Preface.- Introduction.- Species: Reality and Concepts.- Studying Speciation.- Allopatric and Parapatric Speciation.- Sympatric Speciation.- Ecological Isolation.- Behavioral and Nonecological Isolation.- Postzygotic Isolation.- The Genetics of Postzygotic Isolation.- Polyploidy and Hybrid Speciation.- Reinforcement.- Selection versus Drift.-Speciation and Macroevolution.- Appendix: A Catalogue and Critique of Species Concepts.

Published by Sinauer Associates, an imprint of Oxford University Press.Over the last two decades, the study of speciation has expanded from a modest backwater of evolutionary biology into a large and vigorous discipline. Thus, the literature on speciation, as well as the number of researchers and students working in this area, has grown explosively. Despite these developments, there has been no book-length treatment of speciation in many years. As a result, both the seasoned scholar and the newcomer to evolutionary biology had no ready guide to the recentliterature on speciation-a body of work that is enormous, scattered, and increasingly technical. Although several excellent symposium volumes have recently appeared, these collections do not provide a unified, critical, and up-to-date overview of the field. Speciation is designed to fill this gap.Aimed at professional biologists, graduate students, and advanced undergraduates, Speciation covers both plants and animals (the first book on this subject to do so), and deals with all relevant areas of research, including biogeography, field work, systematics, theory, and genetic and molecular studies. It gives special emphasis to topics that are either controversial or the subject of active research, including sympatric speciation, reinforcement, the role of hybridization inspeciation, the search for genes causing reproductive isolation, and mounting evidence for the role of natural and sexual selection in the origin of species. The authors do not hesitate to take stands on these and other controversial issues. This critical and scholarly book will be invaluable to researchers inevolutionary biology and is also ideal for a graduate-level course on speciation.