The Green Turtle Mystery Author:Ellery Queen, Jr. Djuna and Ben weren't sure they believed in ghosts. The little girl who opened the door of the haunted house didn't look like a ghost, yet she vanished into thin air! They had to find out what happened to her. And they had to rescue Waterbury, thw time telling turtle who walked into the deserted house - and didn't walk out. Djuna found clues... more » and he added them all up to solve a case the Secret Service couldn't crack!« less