The Pagemaster by Todd Strasser [MOVIE TIE-IN PAPERBACK]
The Pagemaster by "Jordan Horowitz" [aka Todd Strasser]
MOVIE TIE-IN NOVELIZATION  SCHOLASTIC INC.
Trade paperback with wear to cover and a clipped corner. Inside looks unread.
A young boy who is afraid of everything gets trapped in the local library, where he befriends three strange characters, Adventure, Fantasy, and Horror, and must overcome his fears while journeying through Storyland towards the Exit Sign. Movie tie-in.