Douglas Preston and Lincoln Child are the coauthors of the bestselling novels The Relic, Mount Dragon, Reliquary, and Riptide.

Douglas Preston worked for the American Museum of Natural History, is a regular contributor to The New Yorker, and in 1989 retraced Coronado's thousand-mile odyssey on horseback.

Lincoln Child is a former book editor at St. Martin's Press and has published numerous short-story anthologies.

Behind the gates of a fabulous Hamptons estate, FBI Special Agent Pendergast comes upon the carnage of a gruesome crime: one that recalls the legendary horrors that befall those who make a Faustian pact with the devil. Surrounded by the choking stench of brimstone, the smoldering remains of art critic Jeremy Grove are found in a locked, barricaded attic next to a hoofprint singed into the floorboards.

Unable to resist a case that defies all but supernatural logic, Pendergast reunites with police officers Vincent D'Agosta (Relic) and Laura Hayward (Reliquary) to search for a more earthly explanation. But their investigation soon takes them from the luxury estates of Long Island and penthouses of New York City to the crumbling, legend-shrouded castles of the Italian countryside, where thirty years ago four men conjured up something unspeakable. . .