Sword of Shannara was so clumsily written it was tough the read. I haven't read anything by him in the last few decades so he may have improved. Commodified Fantasy.
The Brothers Hildebrandt.
I tried to read Urshurak but was unable to finish. They should have stuck to illustration.
I've only read one book by her, Magic's Pawn. (I think that's the name.) To quote Dorothy Parker, "This is not a novel to be tossed aside lightly. It should be thrown with great force."