Is fire the next book to graceling?

No, Fire is not the next book in the Graceling series by Kristin Cashore.

Here's the order of the books in the Graceling series:

1. Graceling (2008)

2. Fire (2010)

3. Bitterblue (2012)

4. Eone (2015)

Fire is actually the second book in the series and follows the story of Po, a young man with the Grace of Fire, as he navigates a perilous journey to save his kingdom.