Well that is a pretty good question and I would say PDF is the most common that works across ios, Mac, WIndows, Android and any other available. With PDF you can make sure that the format of your document remains same on each every place it is viewed at a larger extent. You can put passwords and make sure that the person with password can only view it.
You can check Portable Document Format on wikipedia to get an inside out information on the topic.
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.