In this new edition the authors have added well-known additional material in the first three chapters, and added new material that was not available at the time the original edition was published. In particular, the major changes are the following:
The authors also have clarified some text throughout the book and updated the bibliography by adding new references.
The book is also suitable for an introductory course in commutative and ordinary homological algebra.
Edgar E. Enochs, University of Kentucky, Lexington, USA; Overtoun M. G. Jenda, Auburn University, Alabama, USA.