That depends on what type of book and how many pages. As an example, a 200 page 6x9 perfect bound paperback using publisher grade paper costs $5.50 for a single copy. Thanks for the question, I'll add that info to my Hub.
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.