The Secret of Secrets (Brown novel)
| Author | Dan Brown |
|---|---|
| Language | English |
| Series | Robert Langdon |
Release number | 6 |
| Genre | Crime, mystery, thriller |
| Publisher | Transworld |
Publication date | September 9, 2025 |
| Publication place | United States |
| Pages | 688 |
| ISBN | 9780385546898 |
| Preceded by | Origin |
The Secret of Secrets is an upcoming mystery thriller novel by American author Dan Brown and the sixth installment in his Robert Langdon series, following Origin. The book is scheduled to release on September 9, 2025.