This monograph provides an up-to-date introduction to the theory of quantum fluctuations in inhomogeneous superconducting materials. It is suitable as a graduate text as it has grown out of the author's extensive notes from a graduate-level course several years previously. Since then, the material has been constantly updated and revised with the result that this book is the most current one on the important and wide-ranging topic of inhomogeneous superconductors.
