My favorite non-fiction book is The War Against Boys: How Misguided Feminism is Harming Our Young Men by Christina Hoff-Sommers. Very enlightening. Highly reccomended!
I am actually currently reading a non-fiction book for an upcoming review. It is called Seeds of Turmoil: the Biblical Roots of the Inevitable Crisis in the Middle East by Bryant Wright. I'll be posting that review soon. Very interesting and educational.