The Dark Green Tunnel(1984)
(The first book in the Mesmerian Annals series)
A novel by Allan W Eckert
Three children in the Florida Everglades find an entrance to another world which is peopled with centaurs, gnomes, a wizard, and a wicked king, and where they experience both great danger and great joy.
Used availability for Allan W Eckert's The Dark Green Tunnel
August 2000 : USA Library Binding
June 1984 : USA Hardback
June 2000 : USA Paperback