The Chicago Tribune calls this follow-up (to The Relic is) every bit as good and in some ways better. Preston and Child carry off this sequel with great energy and panache . . . their portrait of the underground dwellers lifts this thriller into a category all its own. This should do for the New York Subway system what Jaws did for Long Island beaches. says Booklist. Hidden deep beneath Manhattan lies a warren of tunnels, sewers, and galleries, mostly forgotten by those who walk the streets above. There lies the ultimate secret of the Museum Beat. When two grotesquely deformed skeletons are found deep in the mud off the Manhattan shoreline, museum curator Margo Green is called in to aid the investigation. Margo must once again team up with police lieutenant DAgosta and FBI agent Pendergast, as well as the brilliant Dr. Frock, to try and solve the puzzle. The trail soon leads deep underground, where they will face the awakening of a slumbering nightmare.