The good Beasts of Avantia have been captured by six terrible new Beasts and taken to Gorgonia, where the sky is red, the water black, and Malvel rules. To free the Beasts, Tom and Elenna must journey into the sinister Dark Realm. After all of their adventures so far, Tom and Elenna are more determined than ever to make their way through the Dark Realm and defeat the Evil Wizard Malvel. But within the perilous Black Ocean lurks Narga the Sea Monster. As well as preying on the rebels, Narga is holding Sepron the Sea Serpent, one of the good Beasts of Avantia captive. Only Tom and his friends can bring an end to this evil Beast's reign. Nothing can prepare Tom and Elenna for what they are about to face. Their past victories mean little. Only strong hearts and determination will save them now. Dare you follow once more?Narga the Sea Monster is the third book in the six-book story arc. From Beast Quest #15: The Dark Realm: Narga the Sea Monster "Tom," Elenna said, "Do you think-" She broke off as a dark shadow loomed over them, cutting off the red light of Gorgonia's setting sun. Tom whirled round. Rising out of the sea were six enormous snake heads. "Narga!" Elenna gasped.