For the art fan, there are no greater guides out there than the Blue Guides. The guide for Southern Italy is no exception and was an invaluable companion during my recent trip to Naples including Pompeii and Herculaneum. I purchased it as an eBook and do have a few beefs with that format, but I don't know whether they are due to the Amazon app or to how the eBook was published. For one thing, the searching is nearly useless on the iPad version. The page formatting is poor on the iPhone. Both used lots of valuable battery and required me to jump around. The primary disadvantage was that the maps where cut in two parts and hard to read and not well cross-referenced into the text so I had to use the locally provided maps at the various sites to navigate. Other than that, the context was extraordinary and ever so insightful. Their coverage of the National Archeological Museum was especially great. A must for really appreciating the cultural aspects of the great city of Naples and its wealth of nearby sites.