Bone Crossed is the fourth of The Mercedes Thompson Series.  It starts off with Mercy’s mom showing up when Adam’s over and then Stefan dropping into the middle of her living room flayed, starved, burned, and almost unrecognizable.  He warns Mercy that Marsilia, his Mistress, knows about Mercy’s involvement in the death of one of her favourite vampires.  He tells Mercy to run.  Considering who Marsilia is, it’s something that gets considered.  Considering who Mercy is though, regardless of panic attacks left over from the rape in the precious book, it’s all strategic and not really about running away. The vampires have put a magical skull and cross bones on…