You are able to find used textbooks almost anywhere. Try searching for them at your school's bookstore, at a local off site bookstore (these are normally close to the school), and search on the internet.
Used textbooks can be found online all day long. Another option would be to check at any of your local colleges. Sometimes other students or even the college bookstore will sell used books.
Don't rule out the classified ads in your local paper. Chances are you won't find anything there, but it doesn't hurt to look.
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.