Divine Intervention — Robert Sheckley

In “Sarkanger,” Gregor and Arnold of the AAA Ace Interplanetary Decontamination Corporation take on an extermination job on Sarkan. Things get surprisingly complicated when the target vermin start arguing about who should be wiped out.

The ten other stories in this collection are “At the Conference of the Birds,” “The Destruction of Atlantis,” “Dial-a-Death,” “Divine Intervention,” “Love Song from the Stars,” “Message from Hell,” “The Necessary Thing,” “Robotvendor Rex,” “There Will Be No War after This One,” and “Wormworld.”