A book doesn't need a guideline to be interpreted , I mean do you spend years interpreting every book you read?
Now if I tell you that the "Little Red Hood" book is sacred and needed to be interpreted carefully ,depending on historical events.
I doubt you will be gathering anything useful, because you will see things as I told you or as you wish them to see.
I mean if we interpret every book we read, I don't think we will ever pass kindergarten.