When young Arthur Conan Doyle is o­ffered a spot at Baskerville Hall, a secret school for extraordinarily gifted children, he is elated at being chosen—and being given a chance to turn his family’s fortunes around. There, Arthur makes quick friends with Irene Eagle, a girl who boldly strides into action, and Jimmie Moriarty, a boy whose brilliance rivals Arthur’s own. Together, they discover that their new school is a peculiar place, home to leaning towers and unexplained explosions, prowling wolves and extinct birds.

Arthur quickly makes enemies, too— deadly foes who wants him expelled . . . or worse. When Arthur and his friends are invited into a powerful secret society called the Clover, they must pass three challenging tests to be accepted. But along the way, Arthur uncovers a mystery that will lead to grand adventure . . . and even greater danger.