The Dream Thief by J. M. DeMatteis
This is a groundbreaking mix of fiction and full-colour comic strip that follows a headstrong girl's journey into the bizarre fictional world of Abadazad to rescue her younger brother. In The Dream Thief, Kate needs all the help she can get when she encounters the Lanky Man. He's mean and heartless, and he wants to steal children's dreams. Everyone seems to be against her - which only makes her more determined to find her brother. And Matt is getting closer - isn't he?