As with the other 2 Traditions Gathered books, this one covers 3 different Tradition books. In this ocasion, White Wolf delivers Akashic Brotherhood, Celestial Chorus and Euthanatos in one single book. As a whole, the book increases it's quality.
AK Brotherhood is the worst Tradition book you can imagine. They are depicted as shaolin temple dwellers, who know nothing about outside world. They're much better developed in the 2-page description in Mage 2nd Edition than in the Tradition Book.
Celestial Chorus is a mixed bag. Some good info and some info which could be better developed. The style is fine, though.
Euthanatos is the best Tradition book ever published (maybe along with Order of Hermes), with great information about the death mages, and presented in a very enjoyable form (the story of a trial).
Overall, 1 bad one, 1 enjoyable (but nothing more) and 1 excellent one.