This is a mystery/fantasy book. The story is quite complex with many threads, all necessary as the story evolves. The main character is a rookie PC heading for a dreary job until he sees a murder and meets a ghost. He then works with DCI Nightingale in the Special Assessment Unit. It is a fascinating story with weird and wonderful characters and slight overtones of Harry Potter.
Most of the group enjoyed the book, some even wanting to read more, whilst it was not to the liking of others.