This is a young adult book that makes you stop and think. In the future, babies are created in tanks, mixing human and animal DNA to create their specialty (strength, nurturing), then are raised until the age of 15 when they get assigned a job. They are treated as "non-human", beneath all "trueborn" (meaning more naturally conceived) people. But they still have feelings and thoughts like everyone else.
Meanwhile there's a sadistic plot going on and several 15 year-olds are used to help figure it out.
I enjoyed this one, maybe not as much as I'd hoped, but it was interesting and different then the rest of the young-adult books that I've been reading. If this turns into a trilogy or series, I will read to find out more about what happens to these characters.