It starts as steampunk/supernatural, reminding me a bit of Cherie Priest's Clockwork Century novels. The links between chapters/books are a bit stretched at times, along the lines of "something happened between the previous bit and this one", making you think you've missed something out. The last one, Kraken Moor, really annoyed me in places as parts of sentences are missing!
I still liked it, hence 4*
I am considering finding the rest in the series for a rainy day.