The Dying Sun is a science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 novel by Gary Blackwood

Gary Blackwood

Gary Blackwood, born on October 23, 1945 in Meadville, Pennsylvania, is an American author of popular books for young readers including The Shakespeare Stealer, Shakespeare's Scribe, and Shakespeare's Spy.-Works:...

, published in 1989. Set in the mid-21st century, the book depicts a world where the sun's light is actually diminishing over time, cooling the Earth (as opposed to global warming

Global warming

Global warming refers to the rising average temperature of Earth's atmosphere and oceans and its projected continuation. In the last 100 years, Earth's average surface temperature increased by about with about two thirds of the increase occurring over just the last three decades...

), which causes a mass migration from the U.S. to Mexico. The large influx from the north causes overpopulation and a wave of violence in the south, and James and Robert, two friends, decide to go north to escape the crime-ridden south.

The novel is a 1990 Friends of American Writers Best Young Adult Novel.