Trouble underground... Identical twins Elizabeth and Jessica Wakefield are about to say good-bye to sixth grade--forever!  But it's not over yet.... The entire sixth grade is going cave exploring--spelunking!  At first, Elizabeth is thrilled to roam through the Ice Cave with her friends.  The cave is beautiful--it shimmers with every beam of their flashlights, and Elizabeth even discovers and underground waterfall! But when the guide breaks his leg, it looks like the sixth graders are in for a bigger adventure that they counted on.  Will they find their way out of the twisted underground maze?  And can they do it in time to save their injured guide? Don't miss Books One, Two, and Four in this fantastic four-part miniseries:  Countdown to Junior High!