A Certain Slant of Light
by Laura Whitcomb

Helen is a ghost, and has gone unseen for as long as she can remember. All she knows is she can't stray too far from her host without being pulled into her own personal hell. Her current host: Mr. Brown, high school English teacher. But everything changes when, one day, Billy Blake sees her. And why is he the only one who can?

I give this book 4 out of 5 stars. A good, if depressing read. I recommend it for teen girls 14 and up.