Book release date · Riley Sager
The Unknown release date
Quick answer · Out now (August 4, 2026)
The Unknown by Riley Sager came out on August 4, 2026.
A dual-timeline thriller about five women who vanished from a remote Vermont island in 1926.
Checked Friday, October 9, 2026 · Source: Jen Ryland (August 2026 thrillers)
- Release date
- August 4, 2026
- Author
- Riley Sager
Common questions
When did The Unknown come out?
The Unknown by Riley Sager came out on August 4, 2026.
Who wrote The Unknown?
The Unknown is by Riley Sager.
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