I really enjoyed being back in the universe of Graceling and getting a glimpse into some of the history behind the book. I read review that found the book too long and the main character whiny. I really didn't find it that way at all. The entire thing was delightful and moving and interesting and very absorbing, the way good fantasy should be. I think you should read Graceling first, to understand certain characters that show up, but if you have already read Graceling, you're sure to enjoy Fire as well.