Lucene.Net would be a good choice even if you had the option of full text search.
Lucene is the way to go - a colleague of mine recommends "Lucene in Action" free PDF book, and after first 3 chapters you are up and running.
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.