Forbidden Stone

RICK RIORDAN meets DAN BROWN in this epic historical adventure series packed full of puzzles, clues and edge-of-your-seat excitement!Legend has it that Copernicus found twelve powerful relics that could harness the cosmos and transport people through time when assembled in the shape of an astrolabe. Recognising the astrolabe’s terrible power, Copernicus hid the relics in far-flung corners of the g...