When police divers find two skeletons locked in a bony embrace deep in the mud off the Manhattan shoreline, Natural History Museum curator Margo Green is called in to aid in the investigation. However, she soon learns that she is needed for more than just her anthropological expertise. The authorities also want her for reasons she has been struggling to forget: her experience the prior year, battling a horrific beast loose in the basement corridors of the Museum.The mystery of the skeletons is deepened by a string of brutal murders. Aided by police lieutenant Vincent D'Agosta, the enigmatic FBI agent Pendergast, and the brilliant scientist Dr. Frock, Margo reluctantly begins tracking down their source. The investigation leads them to deserted warehouses, burned-out laboratories, the underground lairs of homeless "mole people" - and, at last, to the stupendous warren of tunnels, sewers, and galleries that riddle the bedrock far beneath Manhattan, where the ultimate secret of the Museum Beast is at last revealed. Read Less