Overview
Logan's Run is a science fiction novel by American writers William F. Nolan and George Clayton Johnson. Published in 1967, the novel depicts a dystopic Malthusian future society in which both population and the consumption of resources are maintained in equilibrium by requiring the death of everyone reaching the age of 21. The story follows the actions of Logan, a Sandman charged with enforcing the rule, as he tracks down and kills citizens who "run" from society's lethal demand—only to end up "running" himself.
Plot
The introduction to the book says:
In the world of 2116, a person's maximum age is strictly legislated: 21 years, to the day. When people reach this Lastday they report to a Sleepshop in which they are willingly executed via a pleasure-inducing toxic gas. A person's age is revealed by their palm flower crystal embedded in the palm of their right hand that changes color every seven years; yellow (age 0–6), then blue (age 7–13), then red (age 14–20), then blinks red and black on Lastday, and finally turns black at 21.
Runners are those who refuse to report to a Sleepshop and attempt to avoid their fate by escaping to Sanctuary—a place where they can live freely in defiance of society's dictates. Logan 3 is a Deep Sleep Operative (also called a Sandman) whose job is to terminate Runners using a special weapon called simply "the gun", a handgun with selectable ordnance keyed to self-destruct if touched by an individual who is not the proper owner. Runners are most terrified of a weapon called the "Homer", which homes in on body heat and ignites every pain nerve in the body, killing the target.
From Wikipedia (CC BY-SA 4.0).