Leiji Matsumoto
In 1975, the original manga series was compiled into three volumes. In 1988, the manga was reprinted and which Leiji Matsumoto added more content into. In 1999, Leiji Matsumoto published his first novel, "Gun Frontier II". The novel was published by Daiwa Shobo and it was told in a non-erotic way compared to the original manga. The novel is now out of print.