I suspect that exactly what you are trying to do is currently not possible. With DataMapper, you can always easily load properties like the artist of a song, and it even uses what they call strategic eager loading, which is described here . But even if the property has already been loaded, it won't be included in the results returned by to_json .
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.