Bill jumped and swore - fortunately not loud enough for anyone nearby to hear, and he was glad Fabien wasn't anywhere in earshot either. Fleur would have stood on a chair to box his ears if she'd found out.
He looked at the book which had inexplicably slid out of its place and fallen to the ground. Certainly not anything he would have even glanced at; the sort of thing old money familes kept on a rarely-visited shelf.
"Curioser and curioser," he said aloud, wryly, a suspicion immediately growing in his mind. Somehow he doubted something was actually haunting the bookshop, at least not in quite so literal a sense.