Mark Harmon was the face of the NCIS franchise for nearly two decades with his portrayal of Leroy Jethro Gibbs, but he departed in early Season 19 and Gibbs hasn't been seen since. While there's still no hard answer about whether Harmon will ever reprise his iconic role or fans will have to settle for revisiting his seasons via Paramount+ subscription, the actor has revealed that his time on NCIS motivated him to embark on a new project: writing a book.
The former NCIS star joined forces to write the book with Leon Carroll, Jr., a technical advisor for the show who also formerly worked as a real-life NCIS agent. The book, called Ghosts of Honolulu: A Japanese Spy, A Japanese American Spy Hunter, and the Untold Story of Pearl Harbor, is a nonfiction project centered on the Office of Naval Intelligence, which was the predecessor to the Naval Criminal Investigative Service. Mark Harmon shared in a statement (via TVLine) why he wanted to tell the story:
