I liked the author until this one
I liked "Outposts" and "Fracture Zone"; "Korea", however, was the end of line for me. Winchester makes a repeated point of how popular he is among South Koreans by virtue of his being English; that was snotty enough by the third go-round. He managed to find one old soldier, fawningly pro-British, as though the U K had been the ones who saved South Korea. What did me in was the time he arrived at a U S base, browbeat them into letting him stay there (when they didn't have to), and then proceeded to trash just about every single U S military person he ran across after accepting their hospitality. He also had a penchant for running into anti-American Koreans; you'd think they were rife, along with all of the many prostitutes throwing themselves at him.
Yes, there's well-researched history here, hence a second star.