"Halo: The Fall of Reach" is a science fiction novel set in the Halo universe, written by Eric Nylund. It serves as a prequel to the video game Halo: Combat Evolved and explores the origins of the Spartan program, focusing on the character Master Chief, also known as John-117. The story details the training and transformation of young soldiers into super-soldiers to combat the growing threat of the Covenant. The narrative follows the fall of the planet Reach, a key military stronghold for humanity. As the Covenant forces launch a devastating attack, the novel highlights the struggles of the UNSC and its soldiers, showcasing themes of sacrifice, loyalty, and the fight for survival against overwhelming odds.