This book is very interesting. I'm not very sure if the people that buy sourcebooks only "for the extra dots" will like it (well, maybe the Thaumaturgy paths and rituals might make it a good buy for them). On the other hand, for the people who look for background information, it is a very interesting buy. It isn't as essential as, say, the Vampire Storytellers Handbook, but it looks nice on the shelf and it can add many good ideas to your ongoing chronicle.
So, if you like to portray "deviants", either as Player Character or as Storyteller Character, in your chronicle, this can be a good add-on to your VtM collection. But tread lightly... the powers-that-be frown on unusual behavior, and those things they don't understand, they want them Finally Dead...