All-star Superman. Vol. 1
(Book)

"Originally published in single magazine form in All-star Superman #1-6" -- t.p.

"Superman rescues a doomed team of astronauts from an exploration mission to the Sun that was sabotaged by Lex Luthor. Luthor orchestrated the event to poison Superman with solar radiation, which greatly increases his power but is also killing him. Luthor is arrested after the publication of a Daily Planet article written by Clark Kent, while Superman decides to keep his impending death secret from the public. Superman reveals his secret identity to Lois Lane. His birthday present to her is a liquefied form of his DNA that will grant her all his superpowers for 24 hours. Using the name "Superwoman", she joins Superman as he stops a monster attack in Metropolis. Superman drives the attackers away and he and Lois spend an eventful day together before her powers fade. Meanwhile, Luthor is convicted of crimes against humanity and sentenced to death. Clark meets with Luthor for an interview at Stryker's Island where Luthor reveals that he has no desire to escape because he has fulfilled his dream of killing Superman. Nearing death, Superman prepares his last will and testament." --adapted from the Wikipedia plot summary for the 2-volume series.