Depends on what you're doing. If you're posting entire paragraphs word for word then it's a problem. If you're writing something like this... When I read 'Writing for Dummies' I learned that insert item here is a good idea for writing well.
They said "Blah, blah, blah, blah..." ...then you're fine. As long as you are citing your source and quoting it correctly (no more than a few sentences at a time) then it's perfectly okay to write about the book on a web site (say your blog for example). From a legal standpoint I will note that this is based on MY knowledge and is NOT solid legal advice or information.
If something is incorrect, I ask other responders to correct me accordingly.
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.