A secret call for help sends Jack Coughlin, Collin, and Danny back to The Hidden Moon to save their new friends!The Hidden Moon adventures continue when twelve-year-old Jack Coughlin awakens to find the stone on his bedroom dresser glowing green. It's not just any stone; it's a special stone given to him when he, his younger brother, Collin, and their friend, Danny, magically visited Anron, The Hidden Moon. The stone is flashing a signal: S-O-S in Morse Code. It can only mean one thing: their new Anronite friends, Karna and Nidar, need their help.Return to The Hidden Moon is the second book in the Children's Hidden Moon Series, by J. S. Keim, filled with fantasy, fun, and danger.