The Stand: The Complete And Uncut Edition by Stephen King was subsequently released in 1990 and contains more than 500 pages of extra material, along with a new beginning and new ending.
The Stand: The Complete And Uncut Edition - Stephen King book description:
One man escapes from a biological weapon facility after an accident, carrying with him the deadly virus known as Captain Tripps, a rapidly mutating flu that - in the ensuing weeks - wipes out most of the world's population.
In the aftermath, survivors choose between following an elderly black woman to Boulder or the dark man, Randall Flagg, who has set up his command post in Las Vegas.
The two factions prepare for a confrontation between the forces of good and evil.