Actor Mark Harmon, retired NCSI agent discuss true-crime book 'Ghosts of Sicily'
Published on April 21, 2026.
The authors of the New York Times bestselling book, "Ghosts of Sicily", Mark Harmon and Special Agent Leon Carroll Jr. The book follows the true story of one of the most controversial missions in the history of the NCIS, set in New York City in 1942. The author and former NCSI agent discussed their collaboration with the publication of the book.
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