This book is intended to provide a fairly comprehensive study of spectral theory of multivalued linear operators defined on Banach spaces. The central items of interest include various essential spectra, but we also consider some of their generalizations that have been studied in recent years. As the spectral theory of multivalued linear operators is an important part of functional analysis and has numerous applications in many parts of mathematics and, we require, in this book, some modest prerequisites from functional analysis.
