There is useful information in this book. The different mentalities of the Tribes of the Moon, introduced in the Core Rulebook, are developed more and the internal chemistry of each of them is elaborated on well. The passages about what is needed to join a tribe or pack are well written and the Ghost Wolves section is especially enlightening. The part that discusses how the Forsaken in different countries cope with their surroundings, in different countries presents some interesting ideas that can be to craft detailed stories. They will stick in the reader's minds and can aid very well in the creation of Forsaken literature.
However, this volume doesn't add many new ideas, overall. It mostly expands upon what has already been written before. The concept of the clutch and the extra gifts are original and handy, but what makes this book worth buying is the greater depth it can give to the Forsaken and it can enlarge the sphere of knowledge of how their minds work. In order to have pleased me enough to give The Rage a better rating, it would have had to have come up with more fresh material.
Whatever faults the book has, however, it makes up for them by delving deeper into the methodology and psychology of the Forsaken, how they organize their packs and how they relate to newcomers. Readers of role playing will find facts and explanations worthy of praise and implementation in.