Cloak

And I'm glad that I did.
The book takes place in New York, with a boy named Will. He hates his life because he's been allergic to everything since birth and he must live in a germ-free environment. He eventually takes charge of his own life and escapes to a hidden world full of enchants.
This book should be a different treat choir those who love fantasy mixed with science fiction, mythology, and Grimm's fairy tales