A great book! I do prefer her writing as Barabara Vine rather than Ruth Rendell, it must be said.
This offering is typical of Vine: more than a bit odd, creepy, an exploration of the darker aspects of human nature. It's fantastically well-written, and grabs a hold of you right from the beginning. Vine introduces her characters one by one, and gradually fills in the spaces in between them, all the way up to the very last page, when the whole story falls so perfectly and neatly into place.
It's a chilling tale in parts, one in which London's Tube network becomes a veritable protagonist, a true player in the story. Vine clearly did her homework before creating this fine book, so as to give the reader all the details one needs to *be* there, in the book. Only when one's one imagination can paint a more vivid picture does she merely sketch an outline for the reader to fill in.
I read this book whilst on holiday, enjoying the Maui sun. But it took me all the way to London, to the suburbs, to the bustling Underground stations, and to the frightening darkness of the deep line Tube tunnels. Truly exemplary writing!