Triplanetary is a science fiction book and space opera by E. E. Smith. It was first serialized in the magazine Amazing Stories in 1934. After the original four novels of the Lensman series were published, Smith expanded and reworked Triplanetary into the first of two prequels (the second prequel was a new original novel, First Lensman). It was published in book form in 1948 by Fantasy Press. The novel covers several episodes in an eons-long human breeding project by the super-intelligences of the Arisians. This alien race is breeding two genetic lines to become the ultimate weapon in Arisia's cosmic war with their arch-enemies, the Eddorians. The initial chapters cover the Kinnison genetic line during the fall of Atlantis and Nero's reign in Rome. These tales were inserted into the novel following the serialized release, along with chapters covering members of the Kinnison line in World Wars One, Two, and Three. This edition has been formatted for your reader, with an active table of contents. This work has also been annotated, with additional information about the book and its author, including an overview, plot synopsis, publication history, reception, biographical and bibliographical information.