You can try fanfiction.net. It has a large collection of fanfics from various fandoms, and there's a good chance you'll find some great Anderson Duchovny fanfic there.
A fan - favorite is 'The Anderson Duchovny Adventure'. It takes the characters on an exciting journey full of twists and turns. The author does a great job of building the world within the story and making the reader feel like they're right there with the characters.
A common theme is the relationship between their characters. Whether it's romantic, platonic or a complex mix of both. Another theme is adventure, as their characters in 'The X - Files' were often on wild adventures. So fanfictions might continue those adventures or create new ones for them.
Alternate universe stories are also quite common. For example, they could be in a world where the X - Files never existed, but they still meet and form a relationship. Or perhaps they are in different occupations, like one being a teacher and the other a journalist, but still end up falling in love.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works. Just search for their names on the site, and you'll likely find a variety of fanfictions about them.
One popular type of Gillian Anderson and David Duchovny fanfiction is the ones that explore their characters' relationships in different scenarios. For example, there are fanfictions that imagine what would happen if their characters from 'The X - Files' had different interactions outside of the show's main plot. You can find some great ones on fanfiction.net by simply using their names as search terms.
David Duchovny has written novels that often blend elements of humor, human nature exploration, and unique narrative styles. 'Holy Cow' for instance, tells a story from the perspective of a cow that wants to escape the fate of being slaughtered. It uses satire to comment on various aspects of modern life such as consumerism and our relationship with animals. 'Bucky F*cking Dent' also delves deep into the relationship between a father and son, with a touch of the surreal and comical that Duchovny seems to be good at infusing into his works.
He has indeed written novels. His works in the literary field show his versatility beyond acting. For example, his novels often explore complex characters and interesting themes, which attract a lot of readers who are interested in his unique perspective.
David Duchovny has 'Holy Cow' among his novels. This novel is an interesting take on the life of a cow with a very distinct personality. The story is told in a way that makes you think about the place of animals in our world. He also has other works that explore different themes, such as identity and the search for meaning in life, though they may not be as popular as 'Holy Cow' but are still worth exploring for those interested in his writing.
Anderson could be the author of the novel. Maybe it's a self - titled work where the author uses their own name in the title to give it a personal touch.