Yes, for random access of an InputStream you must buffer the stream (at least up to the point requested). A library like Unified I/O should work, or you can implement DataInput and DataOutput, which will have your class operating like a RandomAccessFile except for the file part if you have custom buffering needs.
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.