Among the emerging generation of crime writers, none is as stylish and intelligent as Michael Dibdin, who, in "Dead Lagoon," gives us a deliciously creepy new novel featuring the urbane and skeptical Aurelio Zen, a detective whose unenviable task it is to combat crime in a country where today's superiors may be tomorrow's defendants. Zen returns to his native Venice. He is searching for the ghostly tormentors of a half-demented "contessa" and a vanished American millionaire whose family is paying Zen under the table to determine his whereabouts-dead or alive. But he keeps stumbling over corpses that are distressingly concrete: from the crooked cop found drowned in one of the city's noisome "black wells" to a brand-new skeleton that surfaces on the Isle of the Dead. The result is a mystery rich in character and deduction, and intensely informed about the history, politics, and manners of its Venetian setting. "From the Trade Paperback edition."