Edison's Conquest of Mars attempt at fiction, the book was published serially in the "New York Journal". Serviss went on to write other science fiction stories, arguably making him the first American to write science fiction professionally. An early example of what would later be called space opera, "Edison's Conquest of Mars" was also a particularly literal "Edisonade". The book contains some notable "firsts" in science fiction: alien abductions, spacesuits (called "air-tight suits": see Spacesuits in fiction), aliens building the Pyramids, space battles, oxygen pills, asteroid mining and disintegrator rays. The book is set following the abortive Martian attack depicted in "Fighters from Mars",
Revenge of the Mysterons from Mars survey the Mysterons' planet, Mars, with a space probe is threatened when a scientist attached to the project is killed and duplicated by the Mysterons ("Shadow of Fear"). After the Lunar Controller boldly declares the Moon's independence from Earth in its fight against the Mysterons, Captains Scarlet, Blue and Lieutenant Green are dispatched to the colony Lunarville 7 to investigate reports of an unidentified complex being built on the far side of the Moon ("Lunarville 7"). After reporting back to Cloudbase, Scarlet, Blue and Green return to the Moon to remove the power source from the Mysteron complex in Crater