Your SIGMA series has been incredibly popular. In fact, the most recent entry, THE DOOMS DAY KEY, hit #2 on the New York Times bestseller list. What drew you to write a stand-alone thriller now?

January 29, 2026

Your SIGMA series has been incredibly popular. In fact, the most recent entry, THE DOOMS DAY KEY, hit #2 on the New York Times bestseller list. What drew you to write a stand-alone thriller now?

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