Wit'ch Fire by James Clemens is one that I just couldn't finish. In fact, I didn't get very far at all with it.
The story begins with a foreword; never a good sign. Info dump (i.e., background story of a bygone era where bad things happened) ensues. The problem with a forward like that is that the reader isn't invested in any way: not in the world and certainly not in the characters. I'll admit I skimmed through most of it.
Then the story begins. The writing is competent enough, but, ah, the story. It's your basic farm
boy girl who discovers she's the heir to an ancient power that if she learns to control will no doubt save the world. Someone is after her, too, which I suspect means she'll have to flee and will probably meet some nice people who will help her not get killed, or something.
Wit'ch Fire was published in 1999, which is about the time when these sorts of tales were beginning to go out of style. Perhaps if I'd read it back then, I wouldn't feel so detached from it. Perhaps it would have grabbed me and not let go. Perhaps, or perhaps not.
In any case, chalk Wit'ch Fire up as a "not finished."