During the run of the TV series The X-Files, many books based on it were released, written, including novels based on episodes, a series of comic books from Topps Comics, and many "official" and "unauthorized" non-fiction books. Some of the novels, which were published in both hardcover and trade paperback editions, came out as audiobooks read by several of the series' stars, including Gillian Anderson (Ground Zero), John Neville (Fight the Future), Steven Williams (Squeeze), Bruce Harwood (Skin) and Mitch Pileggi (Antibodies and Ruins). Apart from the novels, in 2016 first official The X-Files coloring book was released by IDW Publishing.

The X-Files fiction

Apart from the following series of books, there has also been a Fight the Future book based on The X Files Movie, written by Elizabeth Hand, as well as The X-Files: I Want to Believe by Max Allan Collins and The X-Files: Perihelion by Claudia Gray.

Juvenile Series (Middle Grade)

Young Adults Series

Third Series

Novels

Film Novelizations

====The X-Files Origins ====

Short Story Anthologies

Comic books (trade-paperback collections)

Non-fiction books

and others.