NEW YORK TIMES BEST SELLING AUTHOR The second installment in Rick Riordans blockbuster Norse mythology series has Magnus and friends helping the god of thunder find his missing weapon before all Muspellheim breaks loose. Thors hammer is missing again. The thunder god has a disturbing habit of misplacing his weaponthe mightiest force in the Nine Worlds. But this time the hammer isnt just lost it has fallen into enemy hands. If Magnus Chase and his friends cant retrieve the hammer quickly the mortal worlds will be defenseless against an onslaught of giants. Ragnarok will begin. The Nine Worlds will burn. Unfortunately the only person who can broker a deal for the hammers return is the gods worst enemy Lokiand the price he wants is very high. show more