Oh and I didn't intend to buy the new Harry Potter book, but when I was buying milk and a cooked chicken the pile of books was saying "Buy me, buy me!", so what could I do? I think some "other force" was acting on me in the shop. I've managed to not read it yet, so maybe it was the power of all the books combined ... although I did notice that an assistant replaced the book I'd taken with one from somewhere else in the pile. Spooky!