All-Star Superman is a comic book series written by Grant Morrison and illustrated by Frank Quitely. The story follows Superman as he faces his mortality after being exposed to an overdose of solar radiation.
After learning that he only has a short time left to live, Superman decides to use his remaining time to tie up loose ends and make the world a better place. He reveals his secret identity to Lois Lane, shares his powers with ordinary humans, and even cures cancer.
Throughout the series, Superman faces off against his greatest enemies, including Lex Luthor and Bizarro, while also dealing with personal struggles and emotional challenges. The story explores themes of heroism, sacrifice, and the impact one person can have on the world.
All-Star Superman is considered one of the greatest Superman stories ever told, with its unique take on the character and its exploration of what it means to be a hero.