Triplanetary' by Edward E. Smith, first published in 1934 as a serial and revised in 1948 for book form, is a foundational work in the genre of space opera science fiction. It serves as a prequel to Smith’s famed Lensman series, setting the stage for one of the earliest and most influential interstellar sagas in science fiction history.The novel spans millennia, beginning with an epic cosmic conflict between two ancient alien races: the benevolent Arisians and the malevolent Eddorians. Their secret influence shapes the course of human evolution and civilization. The main narrative eventually settles in the future of Earth, where the Triplanetary League—an alliance of Earth, Mars, and Venus—struggles to maintain peace and order in the face of pirate raids and sinister galactic threats.Key characters include Conway Costigan, a brave and resourceful Triplanetary agent; Virgil Samms, who later becomes a central figure in the Lensman series; and various enemies, including the nefarious pirate Gray Roger, who hides an even darker identity.Packed with futuristic technology, space battles, and sweeping adventure, Triplanetary blends scientific imagination with thrilling storytelling. It laid the groundwork for many of the space operas that followed and remains a classic in early pulp science fiction literature.