Seetee Ship is a science fiction novel by American writer Jack Williamson, writing under the pseudonym Will Stewart. The second in the Seetee series, it is a fix-up adapting two stories previously published in Astounding Science Fiction magazine, "Minus Sign" (first published in the November 1942 issue) and "Opposites—React!" (two installments in January and February 1943).
Seetee Ship was released in 1951 by Gnome Press in an edition of 4,000 copies. Though Seetee Shock (1949) was the first of the Seetee novels to be published in book form, it is set in a later period than Seetee Ship.
Williamson's Seetee series is set in a future where space-dwelling miners attempt to harvest asteroids composed of CT or "contraterrene" matter (an obsolete term in physics) which today would be called antimatter. In "Minus Sign," from which the first part of the book was adapted, spatial engineer Rick Drake continues his father’s quest to tame seetee, but becomes entangled in the interplanetary politics of energy shortage. The second part of the book is adapted from "Opposites—React!" in which a contraterrene alien artifact is discovered, and competing parties race to reach it and learn its secrets.[1]
The first story in the Seetee series, "Collision Orbit" (July 1942 Astounding Science Fiction),was not collected in either of the Gnome Press books.