This novel is considered one of the early works of the science fiction genre. It tells the story of a British engineer, Lieutenant Horace G. Darrell, who travels to Mars by means of a spacecraft he designs himself. On Mars, he encounters a highly advanced Martian civilization and becomes involved in their society and politics.Percy Greg's "Across the Zodiac" is notable for its imaginative portrayal of interplanetary travel and the depiction of an alien society. The novel often explores themes such as exploration, technology, and societal differences between Earth and Mars.As one of the earlier works in the science fiction genre, "Across the Zodiac" is valued for its pioneering vision of space travel and extraterrestrial civilizations, offering readers a glimpse into the imaginative possibilities of science fiction during the late 19th century.