Ghost Cave — Barbara Steiner

MYSTERIES OF THE HIDDEN GRAVE
There's nothing eleven-year-old Marc Schaller likes better than investigating an unexplored cave. So when his hound Bluedog leads him to a cave he's never seen before, he persuades his friends Eddie and Hermie to join him on an expedition. All goes well -- until they find an ancient Indian grave. Hoping for even greater discoveries, the boys dare to venture further into the bottomless maze. Suddenly they're lost, running out of food and water, desperately looking for a way out. Have they disturbed a vengeful ghost? Or will the spirit of the cave guide them to safety?