In the episode "Dead Man Talking", it is revealed that McGee writes mystery/crime stories, and in the episode "Twisted Sister", it is revealed he has published a book entitled "Deep Six". It became known in the episode "Cover Story" that McGee has been successful as a writer, and garnered a fanbase. It was kept a secret from the NCIS team for a long time. Under his pseudonym "Thom E. Gemcity" (an anagram of "Timothy McGee"), he has penned at least two novels as part of the "Deep Six" series, one published and one in progress. The title of the first book, "Deep Six: The Continuing Adventures of L.J. Tibbs" (whose name and character are based on Leroy Jethro Gibbs) suggests there have been previous novels, but these have yet to be named, though the cover of McGee's first revealed book states that it is volume one. The next of McGee's books to be released, and sequel to its predecessor is entitled "Deep Six: Rock Hollow". Sean Murray commented, "As Thom E. Gemcity, he takes many liberties. I don't know if he knew the first book was going to be as successful as it was. But now he's got to run with it. I'm sure success has just increased his level of anxiety." In the episode "Cover Story", Rock Hollow becomes a focus point in that the NCIS team are investigating two murders (both committed because their killer thought they had robbed a convenience store and killed the clerk, as it was written in the book), when McGee is pressured to, and reveals everything that has taken place has been part of the book he is currently writing. It is then discovered that the story was stolen from the typewriter ribbon McGee threw away, and that Abby could be the next victim.