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The Secret of Secrets (novel)
2025 novel by Dan Brown
The Secret of Secrets (novel)
The Secret of Secrets is a mystery thriller novel by American author Dan Brown and the sixth installment in his Robert Langdon series, following Origin. The book was released on September 9, 2025. As of January 2026, the book has been featured on New York Times' best-seller list for 17 weeks in a row.
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