Gibraltar tells a story of perseverance and courage. The siege of Gibraltar is a relatively unknown event, at least in the United States, which is ironic because the British efforts to keep their hold on the Rock had tangible affects on the war in America.
The story is told through the words of those who experienced this monumental, four year long siege. The Adkins rely heavily on eyewitness accounts, and it seemed to me that between one third and one half of the text consisted entirely of diary entries, memoirs, reports, and other forms of first hand accounts. On one hand, this reliance on primary sources lends the book a great deal of credibility, and it gives the reader an excellent sense of the privations experienced, the gruesome injuries sustained, and the emotions that were felt. The first hand accounts give the tale an authenticity that would be difficult to reach otherwise. However, at times I felt that the prose was too saturated with these excerpts. There were moments in which the authors relied too heavily on the accounts instead of explaining more clearly their own words. This feature was especially marked in dealing with the military movements and information. For instance, I rarely had a good grasp on the size of the forces involved. In military history, it's often the case that the private soldier's perspective is ignored in favor of the strategic situation. Here, I feel the case is the opposite.
That being said, I think Gibraltar is designed for a wider audience than the pure military historian. The Adkins do a wonderful job at explaining the nuances of living and soldiering in the 18th century, which makes this book accessible to anyone, regardless of their background knowledge. What's more, this book is illustrated with maps and pictures which greatly aid the reader in understanding the unique geography of Gibraltar. There are seven maps showing Europe, Britain, and most importantly, Gibraltar and its environs. Along with the maps are pictures of Gibraltar taken by the authors which provide excellent resources throughout the reading.
To conclude, the Adkins have provided an excellent, single volume narration of this incredible event. The book isn't perfect by any means, but I think readers will enjoy this book, no matter how much or little they knew about the siege beforehand.