In the middle section of the book Mirabelle breaks into not one, but two houses near Belgravia Books. I had fun scoping these out - checking which windows looked least secure and figuring out how to scale the mews houses to the rear to get her inside. A man came out at one point, 'What are you doing?' he questioned me. 'The thing is, I'm writing a book,' I started with a smile. He waved me off, his hand as wide as a tennis racket. 'Everyone is writing a book, my dear,' he said. Between you and I, it's his house that MIrabelle ends up breaking into.