Here is another series based on magic by Cate Tiernan....Havent personally got this series yet but i intend to as have heard good reviews about it, it is another  collection that is quite hard to find though but here is info and a link to charactor info as well...........    http://en.wikipedia.org/wiki/Sweep_%28book_series%29

 Sweep  ( Series ) By Cate Tiernan    ( 15 Books in total, 14 novels and 1 super edition)

The "Sweep" series, published in the UK, the Netherlands and Australia as "Wicca" and in Italy and France as "Dark Magic", is a series of books by Cate Tiernan. Starting with Book of Shadows, the series is a work of fiction set against a U.S. East Coast background. The heroine, Morgan Rowlands, discovers that she is a "blood witch" and learns that she must battle dark magick.

As the series progresses, Morgan comes into contact with not only a truly remarkable set of characters but many problems that teens face today.

Books Listings

I loved this series reading it as a teenager, but it ends too quickly and too soon! 

I have still only managed to get the coven still waiting to try and get copys of all the others.....real nightmares

 Have you tried the library? Almost all of them were on my system.