Help with a title for the book I'm writing?

I'm writing a book but I can't come up with a name for the title! The story is about these creatures who start out in a lab in incubators as babies, and as they grow older they start uncovering more secrets about the bad things that happened in the past, like the war with an evil clan of monsters and stuff. Their parents don't really want them to know or anything, 'cause now the evil clan has returned to turn them over to the "dark side." The teen-aged creatures then try to find out more and ultimately try to save their fellow "good" creatures. In my story, the creatures that can pass as human, do. But humans know they exist. It's just the law that creatures have to have their own school. (The ones who pass as human ARE breaking the law, but no one really knows.) So what would be a good, no, great title? Thanks!