The advantage of this book is about the research that has gone into providing the details of the various battles and confrontations that happened during this stage. The defeat and push back of the German armies from Sicily and evacuation from the entire island was a series of skirmishes and battles, with the German armies not being a pushover, fighting hard and also being intelligent thinkers. During the entire campaign, the German army essentially took over the Italian war campaign from the Axis side, with the Italian army not being too much in the picture.
During these battles, not everything was positive. There were failures from the various army leaders and generals, some of these were removed from their command positions during the course of these battles, and the person who developed a great reputation during these battles was also forced to relinquish his command and go into exile (this being General Patton, who slapped 2 soldiers for what he believed was cowardice and had to face severe problems when these slaps became public knowledge).
The book provides a lot of details of the entire campaign, something that a student of the war effort, or one who wants to read about this entire campaign. A must read book.