Book excerpt: "Concerned, Le Guern brings the puzzling notes to the bumbling but brilliant Chief Inspector Jean-Baptiste Adamsberg and his straight-edged, right-hand man, Adrien Danglard. When strange signs that were historically believed to ward off the black death start to appear on the doors of several buildings, Adamsberg takes notice and suspects a connection with Le Guern's warnings. After a flea-bitten corpse with plague-like symptoms is found in one of the marked buildings, Fred Vargas's inimitable genius chief inspector is under pressure to solve the mystery and restore calm to a panicked Paris. But is it a real case of the bubonic scourge, or just a sinister trick designed to frighten as the body count grows and the culprit continues to elude the police?"--BOOK JACKET.