The Green Turtle Mystery

To rescue a friend's pet turtle, Djuna must solve the riddle of a haunted house

His new shoeshine box under his arm, boy-sleuth Djuna is looking for customers when he meets a young reporter named Socker Furlong. Socker assigns Djuna and copyboy Ben Franklin to investigate a haunted empty house. Djuna, Ben, and Ben's pet turtle are having a lot of fun creeping around outside—until the place turns out not to be so abandoned after all.

Djuna sees people inside the house, and when he knocks,...