From the reviews:

“The concept of Frobenius category (also called saturated fusion system) has been developed by Lluis Puig many years ago. … This volume is a research monograph containing many original results which appear for the first time in print … . The book ends with Appendix developing the author’s point of view on cohomology of small categories. … the book is a necessary tool for any researcher in the field.” (Andrei Marcus, Studia Universitatis Babes-Bolyai, Mathematica, Vol. LV (4), December, 2010)

“In recent years a new concept–called Frobenius category by Puig and fusion system by others–has become very successful in the representation theory of finite groups. … the book gives an account of the early developments and definitions presented by Puig, as they were given in his first manuscripts. This certainly is of great importance because it makes the first, original definitions of Puig accessible to a wide audience.” (Alexander Zimmermann, Mathematical Reviews, Issue 2010 j)