Special Agents Fox Mulder and Dana Scully investigate a series of inexplicable phenomena that threaten national security and human safety. Tasked with uncovering the truth behind clandestine government operations and extraterrestrial encounters, the duo must navigate a landscape of deception, bureaucratic obstruction, and lethal danger. The narrative follows their procedural investigation as they apply scientific rigor and intuitive leaps to solve cases that defy conventional explanation. Each installment presents a self-contained mystery that contributes to the broader, overarching conspiracy surrounding the existence of alien life on Earth.

These novels serve as direct adaptations and expansions of the iconic television series, capturing the specific tone and character chemistry that defined the show. Readers often appreciate how the prose maintains the dark, paranoid atmosphere that made the original episodes successful. The books are frequently noted for their ability to translate the visual suspense of the screen into descriptive, text-based narratives. The reception suggests that fans of the franchise find these entries to be faithful representations of the source material's core themes and investigative style.