I am currently reading my way through a long list of science fiction and fantasy titles. (http://www.npr.org/2011/08/07/138938145/science-fiction-and-fantasy-finalists if you are interested in the list).
It must be hard, to follow someone else's story line (King Lear) but still give it your own style. This author is doing a bang-up job of that. It has all the back-stabbing glory of the original but with Ms. Gratton's version of the characters and this dark backdrop for them to perform against.