Recommended Guides:

Lonely Planet: Naples and Amalfi coast

DK Eyewitness Travel Guides: Naples & the Amalfi coast

Fodor's Citypack: "Naples' 25 Best"

Background/History:

Luigi Barzini's "The Italians" 

Charles Richards' "The New Italians"

Norman Lewis' "Naples '44"

Dan Hofstadter's "Falling Palace: A Romance of Naples"

Carla Capalbo's "The Food and Wine Guide to Naples"

Donatella Mazzoleni's "Palaces of Naples"

Massimo D'Antonio's "Campi Flegrei: A Guide of Discovery to the Lands of Fire"