Objects in image: Book
Text visible in image: TOWER, HUNT, REASUR, ISSING, ING, SHORE, SECRET, MYSTERY, HIDDEN, CHUMS, FOR, ROAD, HIDDEN, AYSTER, CAVES, PENED, CLOCK, PRINTS, HARBOR, ICKED, MYSTERY, MILL, DOOR, NIGHT, RANKLINW, THE, THE, THE, THE, HARDY, THE, THE, HARD, THE, THE, BOYS, HARD, HARDY, HARDY, HARDY, HARDY, HARDY, HARDY, HARDY, BOYS, HARD, HARDY, HARDY, HAR, SERIES, BOYS, BOYS, BOYS, BOYS, BOYS, BOYS, BOYS, BOYS, BOYS, SERIES, BOYS, BOYS, SERIES, SERIES, SERIES, SERIES, SERIES, SERIES, ERIES, SERIE, SERIES, SERIES, CROSSET, GROSSET, GROSSET, GROSSET
Question: what series of books is this?
Answers: the hardy boys, the hardy boys, the hardy boys series, the hardy boys series, the hardy boys series, rigo star, hardy boys, the hardy boys, hardy boys series, the hardy boys