A fitting companion to the existing volumes and a welcome addition to the literature on functional analysis. The exercises ... were carefully designed by the authors to illustrate the results of the text and to expand its scope ... the authors' solutions ... are models of clarity and efficiency, reflecting their vast experience and insight into the subject. -- Mathematical Reviews The organization (exercise groupings), extra index of Volumes III and IV and the special bibliography will be very helpful in finding material for seminar or private projects. -- Monatshefte fur Mathematik