You can't research something that we have no proof exists. I'm confused by your question. There are books that speculate on the existence of extraterrestirals, and make educated assumptions as to what life on another planet may be like, but I'm afraid that no fact based book has been (or can be) written on the subject.
As far as I can tell - and am certain of in the case of David Ickes - the authors you have listed are known for writing about conspiracy theories. Let me tell you that there in the overwhelming majority of cases, there is no credability to conspiracy theories.
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.