If you've never read the book, now's a good time to pick up a copy before the film drops. The story centers around a young girl named Sophie, who lives in an orphanage. One night, during the Witching Hour, she sees a giant cloaked figure blowing something from a trumpet-like object into a bedroom window down the street. The figure (known as "BFG", or "Big Friendly Giant") notices her, then carr…