If the Circle of the Crone or Lancea Sanctum play any role in your chronicle this book will prove itself invaluable. These new mechanics for blood sorcery are much more versatile than the original without abandoning the essence of the vampiric existence. The system can also be easily adapted to traditions of your own design.
As an alternative to blood sorcery, Threnodies are special effects vampire can invoke by drawing deeper on the Beast using song (or chants, poetry, rhythmic music) and committing a sacrifice. These effects are derived from Disciplines and they can be quite potent but they are also very dangerous. If the character performing the Threnody somehow fails to do so correctly (by failing or dramatically failing the roll) the negative results can be disastrous and varied. My particular favorite result is the vampire loses control of the Beast. No, not frenzy. The Beast actually flees the vampire's body and runs rampant.
If your troupe is looking to get more out of blood sorcery this is a great book for you.
[5 of 5 Stars!]