I cannot be the only fan of Simon Green who is deeply disappointed by this book. It is a bit like reading Scooby Doo meets Ghostbusters. For a while I thought it was meant to be a juvenile novel, until I came across the first sexual reference and had to revise my ideas. It is a rambling tale of hauntings in the London Underground and their exorcism by a group of dysfunctional operatives working for a secret organisation operating out of Buckingham Palace. I could not work out if HM is supposed to be M. The book lacks the verve and sheer readability that the author achieves so well in Nightside and the Drood novels. I hope he sticks to these and does not try to turn this novel into a Ghostfinders series.