Fine hardcover in dust jacket. Bumped corners. Results from 30 years of collaboration between the evolutionary biologist Ernst Mayr and the ecologist Jared Diamond. Questions illuminated include why some species are much more prone to speciate than others, why some water barriers are much more effective at promoting speciation than others, and whether hypothesized taxon cycles, faunal dominance, and legacies of Pleistocene land bridges are real. Nine color plates depict 88 species and allospecies.