Torchwood: The House That Jack Built - Adams, Guy

Jackson Leaves - an Edwardian house in Penylan. Left in good condition to Rob and Julia by Rob's late aunt. It's an ordinary sort of a house. Except for the way the rooms don't stay in the same places. And the strange man that turns up in the airing cupboard. And the apparitions. And the temporal surges that attract the attentions of Torchwood.