1. Fifty Shades of Grey
2. Fifty Shades Darker
3. Fifty Shades Freed
E.L. James did previously release two additional companion novels:
- Grey: Fifty Shades of Grey as Told by Christian (May 2015)
- Darker: Fifty Shades Darker as Told by Christian (November 2017)
These companion novels retell the events of the original books from Christian Grey's perspective.
It is always possible that E.L. James may decide to write additional books set in the Fifty Shades universe in the future, but as of my current knowledge, there are no announcements or confirmed plans for any further releases at this time. You can check for any updates on the author's official website or through reliable sources covering books and publishing industry news.