Oh, this book was creepy. Creepy, but addictive!

Mr. Hemming owns a successful estate agents.

He also has a copy of the key to each house he has ever sold. He visits them when their owners are out. He leaves no trace, although he does sometimes help himself to a slice of cake or a cup of coffee. But he always cleans up after himself.

Mr. Hemming likes to see what kind of life you are living. For the most part, he just watches and observes. But every now and then he takes action. And Mr. Hemming will make sure things are set right.

But if you happen the cross paths with Mr. Hemming in a way he doesn't like? Well, he will set things right.