I enjoyed this book a lot. I couldn't put it down. Mackie is trying to be invisable. Kind of hard to do when you aren't human. Especially hard when you are in high school and things like metal, and blood send you into a fainting spell. But he makes the best of it, and has some really wonderful friends. Unfortuantly, he is getting sick. Its getting harder to handle the steel, blood, and other things that harm him. He is getting weaker. He finally find people who have answers, unfortnantly, they are the ones he wants. Now he must choose between getting better, or doing what's right.
This was a fascinating book. I really loved how it took place in his point of view, instead of a humans. I look forward to more books by her.