Share 'Another question about contacting authors...'

Would it be considered inappropriate for me to approach an author with a question for a blog post that I'm doing, if I didn't give the author's book a rave review? I recently read a book that I gave a mediocre review to, though I did highlight some of the positive aspects of the book as well. And while I didn't love the book I would really like to contact the author, who seems like a very interes…