The X-Files: Goblins by Charles Grant The translation of an idea intended for the strictly visual medium of television to the literary medium of the printed page is always difficult and often unsuccessful. In many ways, Charles Grant has succeeded in interpreting Chris Carter’s “The X- Files” into book form (“The X-Files: Goblins”, HarperPrism, 1994, $4.99). Agents Mulder and Scully are assigned by their new boss, a newcomer named Douglas, to investigate two murders in a town near Ft. Dix, New Jersey. The MOs suggest a serial killer known to his victims, who prefers a slashing bayonet for that up…