- Deep Dark (2013)
- The Leftovers (2014)
- The Bone Orchard (2016)
- The Visitors (2017)
- All That's Left Unsaid (2018)
- The Book Case (2019)
- The Last House (2020)
- The Haunting of Leigh Harker (2021)
Fanning has also written for several television shows, including:
- The Following
- American Horror Story
- The X-Files
- The Handmaid's Tale
- The Walking Dead
- The Umbrella Academy
In addition to her books and television work, Fanning has also written for several magazines and newspapers, including The New York Times, The Wall Street Journal, and The Atlantic.