Hello. It is nice to find a favorite author who actually says he will reply. My question may seem silly but I cannot seem to find the answer anywhere I have looked. I am currently reading The Fort and in it is mentioned many times the phrase PK, in reference to a defense line. Would you be so kind as to tell me the meaning of the term? And the origin of it? I Have read some of the Shape novels and liked them very well. I also liked watching the series on PBS> I think the casting for Richard Sharpe was right on the mark, excellent choice. Thanks so much for your books and your kindness in answering my query. Sincerely, Karen