Chris Skinner, Amy’s new boyfriend, comes from a broken home.

He hasn’t seen his father in, like, forever. And when his dad finally appears, it isn’t to make up for Chris’s miserable childhood. Mr. Skinner is ill — so ill that he needs a bone marrow transplant. Chris could be the perfect match. Nothing strange in that, except . . .

What if ailing grown-ups could tap into a guaranteed reserve of healthy body parts?

What if innocent kids were being harmed? What if you were bred to become an unwilling donor? Amy knows she’s blessed with superhuman genes, but no way, nohow is she going to let herself, or any other kid, fall prey to freakish science-fiction experiments!