The Mirror World of Melody Black

It all starts, as these things sometimes do, with a dead man. He was a neighbour, not someone Abby knew well, but still, finding a body when you only came over to borrow a tin of tomatoes, that comes as a bit of a shock. At least, it should. And now she can't shake the feeling that if she hadn't gone into Simon's flat, if she'd had her normal Wednesday night instead, then none of what happened next would have happened.
And she would never have met Melody Black .