Subject Areas

One thing we could use more of in schools is an understanding that real life is not neatly divided into separate subject areas.
Just the other day I was reading a book about the history of the scientific method as applied to medicine. In which subject would you find this wonderful book in school? I was reading a book, should it be in English class? It was a history book, so should it be in Social Studies? The book was about science though, should it be put in Science class?
The answer, sadly and simply, is that you would never read something like that before you got to college. You wouldn't see that book at all because there isn't one clear-cut category in which it would fit. Standard K-12 education is uncomfortable with books like that.