Toku/Amos.
To be quite honest, I would have enjoyed it more if the author had focused on the actual magic study a little more instead of dwelling so much on the moral implications. There are two chapters that deal with the actual mechanics of Dark magic versus Holy, and take a close look at the positive effects of Holy magicks on the hume body that I found quite interesting.
I'm afraid over the past two years I haven't had much chance to stay abreast of new publications on magic theory/comparative magicks. Any recommendations would be greatly appreciated.