Ice is one of the most abundant and important materials on Earth, and its unique physical properties are an active area of research in a number of disciplines. This book focuses on the physics of ice, its material properties, and how these are reflected in its molecular and crystalline structure. Despite its simple crystal structure, ice has a rich array of properties due to its hydrogen bonds, and this book includes an extensive discussion of this research. The book provides a careful development of the physical principles underlying the properties of ice and is aimed at pure and applied researchers in the field. It features descriptions of new work on electrical, mechanical, and surface properties, and on the occurrence of many different crystalline phases.