- Book Review: ‘The Secret of Secrets,’ by Dan Brown The New York Times
- The Secret of Secrets by Dan Brown review – weapons-grade nonsense from beginning to end The Guardian
- Dan Brown’s new novel is ridiculous – and will be as big as The Da Vinci Code The i Paper
- Dan Brown’s new novel — 688 pages of cliché and conspiracy theories The Times
- Dan Brown’s new novel is fun, if you don’t engage your brain The Telegraph