From the reviews:

„The aim of this book is to study infinite dimensional spaces, multivalued mappings and the associated marginal functions … . The material is presented in a clear, rigorous manner. Besides the bibliographical comments … references to the literature are given within the text. … the unified approach to the directional differentiability of multifunctions and their associated marginal functions is a remarkable feature of the book … . the book is a useful contribution to nonsmooth analysis and optimization.“ (Winfried Schirotzek, Zentralblatt MATH, Vol. 1061 (11), 2005)