Nine-year-old Polly and her younger brother, Sam, find a corked bottle at the beach. Inside is an ancient parchment promising three wishes. Before their adventure is over, older brother Joe will disappear and Polly and Sam will have to journey under the sea to get him back! This first book in the new Magic Elements quartet combines magic and adventure in an easy-to-read format perfect for the in-between reader. From the Trade Paperback edition.