Independent publishers Wild & Woolley published a "best of" collection of the earlier cartoon books, "The Cobb Book" in 1975. A follow-up volume, "Cobb Again", appeared in 1978. In 1981, "Colorvision", a large-format, full-colour monograph appeared, including much of his design work for the films "Star Wars" (1977), "Alien" (1979), and "Conan the Barbarian" (1982), the first feature for which he received the credit of Production Designer. Cobb has also contributed production design to the films "The Last Starfighter" (1984), "Leviathan" (1989), "Total Recall" (1990), "True Lies" (1994), "The Sixth Day" (2000), "Cats & Dogs" (2001), "Southland Tales" (2006), and the Australian feature "Garbo," which he directed. Cobb contributed the initial story for "Night Skies", an earlier, darker version of "E.T.." Steven Spielberg offered him the opportunity to direct this scarier sequel to "Close Encounters of the Third Kind" until problems arose over special effects that required a major rewrite. While Cobb was in Spain working on "Conan the Barbarian", Spielberg supervised the rewrite into the more personal "E.T." and ended up directing it himself. Cobb later received some net profit participation. In 1985 Cobb received credit as DeLorean Time Travel Consultant for the film "Back to the Future". During the early 1990s, Cobb worked with Rocket Science Games. His designs can be seen most notably in "" (1994) and "The Space Bar" (1997), in which he designed all the characters. Cobb also co-wrote with his wife, Robin Love, one of the (1985–1987) "Twilight Zone" episodes. Among the most famous film props signed by Cobb are two of the swords he designed for the 1982 film "Conan the Barbarian" (the "Father's Sword" and the "Atlantean Sword"). Cobb's original drawings of the swords are nowadays used, in cinema merchandising, to mass-produce and sell replicas.