The book "Cold-Adapted Organisms" offers a comprehensive examination of the adaptation mechanisms of microorganisms, plants, and animals living in cold environments. It highlights the ecological and physiological aspects of these organisms and demonstrates how they have adapted to temperatures below 10 °C. The authors, Rosa Margesin and Franz Schinner, present current research findings that explain the enzymatic and molecular foundations of cold adaptation. Notably, the first crystal structures of enzymes from cold-adapted organisms are emphasized, providing deep insights into the biochemical processes. This specialized book is aimed at scientists and students who study the ecology and physiology of organisms in extreme environments.