Oh my gosh, this was unexpected, mysterious, disturbing, and gory. The best of the series up to now, and the best horror novel I've read in some time. A compassionate and hardworking nurse, an arrogant but competent doctor, a terribly badly wounded victim of a World War 2 bombing, the latter's young daughter, a collection of ghosts, and a few other characters must make their way through the strangest night of their lives in the hospital; a night where unsettling and impossible things happen until the main character works out how to solve it all. Even outside this series, this would have been a brilliant standalone piece of horror.