As a big fan of the Middle Ages ( although a total amateur), I am mesmerized by the inventivity of the questions (and throughliness of the answers) in that domain on SE History.
Why isn't there a book with the questions and best answers? Is this because there was never an interest in publishing one? Or due to copyright issues? Or something else?
My professional area is information security and the relevant stack exchange site is full of excellent content but I do not feel that it would be as interesting in a book as is history.