I had a couple of issues with this book, like how it sometimes got too technical about sailing and medicine, but overall I liked it. It was exciting and suspenseful and it wasn't too obvious. And the bad guys were not the US government. The only thing that bothered me was that most people don't know much about the Shetland Islands, and the author introduces the people of the islands as a somewhat sinister race. That bugged me. But maybe people will be intelligent enough to realize that a fiction book is fiction, not fact, and overlook that problem.