The Dark Green Tunnel Author:Allan W. Eckert, David Wiesner (Illustrator) This is a fantasy, a la C.S.Lewis, about twins (boy and girl) who find their way into a parallel world in which there are strange creatures, strange people, strange topography, and evil kings and warlocks trying to rule the entire land of Messmeria. The twins join the "good" forces to help overcome the evil ones.