I keep describing it as Anne Rice meets The Witcher. Unique, elaborate worldbuilding, complicated characters, twists on well worn vampire & shapeshifter lore. 
It had a good recap of the previous book at the beginning &the audio narration is excellent.
 1 part dragged, but for the most part it was easy to get absorbed in & THAT ENDING was absolutely packed with action &drama. I cannot wait to see where this goes in book 3