While a great effort has been made to discover new high temperature superconductors, a large-scale, parallel effort has been made to determine the fundamental properties of these fascinating new materials. This is perhaps one of the best books in the field describing these vital properties in an organized and comprehensive manner. The authors are well known for their creative and powerful research on the new superconductors. This volume will be a useful reference for research workers and for graduate students. A subject index is also included for the user's convenience.