Book 3 in the "Traveling Circus" seriesCordelia and Flynn face the ultimate challenge: controlling the power within themselves.Cordelia has the opportunity to join the Olympic Swim Team, but her coach wants her to practice day and night for the competition. Can she learn to control her mermaid powers in time?Flynn's dreams of Art College go up in smoke. Riddled with self-doubt, he gives up hope...until Albert the Fortuneteller shows up on his doorstep needing help.Can the Skeleton Key unlock their futures?