“The coming wave; or, The Hidden Treasure of High Rock" - an exciting adventure novel from the famous writer Oliver Optic. In this book, go on an incredible journey with the main characters - young friends who discover a secret hidden on the rocks of a high mountain. Full of mystery and danger, this novel teaches friendship, loyalty and courage. Discover with the characters the secret of the rock treasure, which will cross the paths of their lives forever. “The coming wave; or, The Hidden Treasure of the High Rock" is a book that will retain its fascination and curiosity throughout its reading.