original_query: What is the content of the book "L'età longobarda – IV" by Annalisa Bracciotti?
query: What is the content of the book "L'età longobarda – IV"?
answer: The provided text does not contain information about the content of the book "L'età longobarda – IV".  The reference list mentions "L'età longobarda – IV" as containing an article by Gian Piero Bognetti on the ethical-political relations between East and West from the 5th to the 8th centuries, but this is just one article within the book, not its entire contents.