The book "Evolutionary Biology and Ecology of Ostracoda" offers a comprehensive analysis of Ostracoda, a group of crustaceans characterized by their extensive fossil record and wide distribution. These features make them excellent models for evolutionary studies. The contributions in this volume stem from the 13th International Symposium on Ostracoda and cover a broad range of topics, including the evolution of both living and fossil forms, the ecology of marine and freshwater species, as well as the morphological aspects of soft bodies and shells. The various scientific disciplines that contribute to evolutionary biology, such as morphology, paleontology, genetics, and ecology, are enriched by research on Ostracoda. Each of the fifteen chapters illustrates how these studies can contribute to the overall theory of evolutionary biology and ecology.