Comic book hero
Henry Cavill says that he went back to the original source comic books to prepare for the role, and he gave Day & Night these three recommendations for anyone wanting to deepen their knowledge and enjoyment of the Superman mythology:
The Death of Superman (1992)
Adventure that sees the hero engage in a relentless battle with the killing machine known as Doomsday. As the title suggests, both characters die from their wounds at the end.
The Return of Superman (1993)
The later work covers the aftermath of the character's death, the emergence of new contenders for the role, and the eventual resurrection of the original Superman.
Superman: Red Son (2003)
An alternate history of the Superman story, in which the young Kal-El crash-lands in the Soviet Union rather than the USA.