What sort of non-fiction do you read? Because the non-fiction books I know are mainly books with facts, such as books on archeology, sociolgy, literature and linguistics and I can't seem to imagine people being bored by fiction but not bored by those.
Well I hate to tell you this but all of those topics you mentioned to me are intriguing to me. I guess some people like them and some don't. I read a 608 page book on the Federal Reserve.