Parts of this book were fascinating, and parts made me groan. I loved the story of Stephen, an invisible 16-year-old boy who has never been seen -- and has never even seen himself. What I didn't love was the turn the book takes into witchy mumbo-jumbo, full of spellcasters and cursecasters, and a powerful spellseeker who can draw out curses. Said spellseeker just happens to be Stephen's new neighbor -- and she can see him! Inevitably, Stephen and Elizabeth fall in love pretty much instantaneously and then set out together to break the curse that keeps him invisible. 
 Yeah, it's all a bit much, and the spells and curses business feels like old news. Yet the idea of a boy who's been invisible since birth is really quite amazing, and the chapters that focus on Stephen's experiences are very good. Unfortunately, that's only about half the book. 
 I couldn't put Invisibility down once I started it, but at the same time, I found too much in this story that frustrated me to really be able to recommend it without hesitation. 
 My longer and more detailed review is now up on my blog.