From the atomic age in Atlantis to the far-flung future, here is a story of interstellar war with Earth as the prize for the victor. The elder race of our galaxy, the Arisians, using advanced mental science, has foreseen the invasion of our universe by the evil Eddorians. The Arisians begin a breeding program on every world that can produce intelligent life, the goal to produce super warriors who can repel the Eddorians. Triplanetary is the early history of that breeding program on Earth, illustrated with the lives of several warriors and soldiers. It ends with the discovery of the interstellar space drive, formation of the Galactic Patrol, and the first Lens-an Arisian device that provides its wearer with mind-reading and telepathic abilities-given to the first Lensman on Earth.
Apparently motionless to her passengers and crew, the Interplanetary liner Hyperion bored serenely onward through space at normal acceleration. In the railed–off sanctum in one corner of the control room a bell tinkled, a smothered whirr was heard, and Captain Bradley frowned as he studied the brief message upon the tape of the recorder—a message flashed to his desk from the operator's panel. He beckoned, and the second officer, whose watch it now was, read aloud: "Reports of scout patrols still negative." "Still negative." The officer scowled in thought. "They've already searched beyond the widest possible location of the wreckage, too. Two unexplained disappearances inside a month—first the Dione, then the Rhea—and not a plate nor a lifeboat recovered. Looks bad, sir. One might be an accident; two might possibly be a coincidence ...." His voice died away. What might that coincidence mean?