It is non-stop adventure for the Thea Sisters — Colette, Nicky, Pamela, Paulina, and Violet! It begins with the Mouseford Academy talent search to find an opening act for boy band sensation 6 Seconds of Spring, but quickly turns into another adventure and a mystery. Will they be able to get in tune or will their search be off-key? Then, guest professor Thea Stilton gives the assignment of a lifetime — a scavenger hunt around Whale Island. The Thea Sisters and friends must rely on their wits and friendship to gather all the clues needed to find the secret treasure! Collecting the best-selling Thea Stilton graphic novels 7 and 8 in a new paperback edition!