Superman Reading Order

Before Superman

 * Krypton
 * House of El
 * Brainiac
 * Zod & Rogol Zaar
 * Destruction of Krypton

Birthright

 * 1) "Secret Origin"
 * 2) "Metropolis"
 * 3) "Grounded"
 * 4) "Bulletproof"
 * 5) "Up in the Sky"

Man of Steel

 * "Mild Mannered"
 * 1) "First Contact"
 * 2) "Bottled City"
 * 3) "Legacy"
 * "The Specimen"

World's Finest

 * 1) "A Dark Night in Metropolis"
 * 2) "The Brave and the Bold"
 * 3) "Super Friends"

The Trinity
Justice League
 * 1) "The Bargain"
 * 2) "The Call"
 * 3) "Brave New World"

Superman: For Tomorrow

 * 1) "City of Tomorrow"
 * 2) "Kryptonite"
 * 3) "Public Enemy"
 * 4) "The People vs. Superman"
 * 5) "Nemesis"

Supergirl

 * 1) "Passenger"
 * 2) "Warrior"
 * 3) "Prisoner"
 * 4) "Traitor"
 * 5) "Hero"

Superman: For All Seasons

 * Spring - "Red"
 * Summer - "Superman Unbound"
 * Fall - "Luthor Unchained"
 * Winter - "Blue"

CRISIS ON INFINITE EARTHS

 * 1) "Monitor"
 * 2) "Destroyer"
 * 3) "Qward"
 * 4) "Oblivion"
 * 5) "Genesis"
 * 6) "New Earth"

Death of Superman

 * 1) "Abomination"
 * 2) "Unstoppable"
 * 3) "Doomsday"

Reign of the Supermen

 * 1) "Funeral for a Friend"
 * 2) "Men of Steel"
 * 3) "Bloodlines"

Return of Superman

 * 1) "Secret Identity"
 * 2) "Smallville"
 * 3) "Scorched Earth"

Superman vs The Elite

 * 1) "Truth"
 * 2) "Justice"
 * 3) "Hope"

Last Son of Krypton

 * 1) "Panic in the Sky"
 * 2) "Phantoms"
 * 3) "Atonement"

Red Son

 * 1) "Genocide"
 * 2) "Last Stand"
 * 3) "Sundown"

FINAL CRISIS

 * "Twilight"
 * 1) "Godfall"
 * 2) "Godspeed"
 * 3) "Submit"
 * 4) "Resist"
 * 5) "Omega"
 * 6) INFINITE CRISIS - "The Abyss"
 * Dawn

SINESTRO CORPS WAR

 * "Prophecy"
 * 1) "Fear"
 * 2) "Will"
 * 3) "Rage"
 * 4) "Darkness"
 * 5) "Light"
 * 6) INFINITE CRISIS - "Beware My Power"
 * "Entity"

Superman Beyond
Cunning Allies
 * "Multiplicity"
 * 1) "House of Heroes"
 * 2) "Book of Limbo"
 * 3) "Black Sun"
 * 4) "The Void"
 * 5) "Eternal Midnight"
 * 6) INFINITE CRISIS - "52"
 * "Multiversity"

The Zero Hour

 * 1) "Out of Time"
 * 2) "Future Tense"
 * 3) "Supernova"
 * 4) "Parasite"
 * 5) "Vanishing Point"

New Krypton

 * 1) "Kandor"
 * 2) "Sunrise"
 * 3) "House of El"
 * 4) "Master Race"
 * 5) "Last Son of Earth"

Whatever Happened to the Man of Tomorrow?

 * 1) "Up, Up, & Away!"
 * 2) "American Alien"
 * 3) "Lois & Clark"

Superman & The Legion of Superheroes

 * 1) "Exile"
 * 2) "Escape from Bizarro World"
 * 3) "Absolute Power"

Superman at the End of Days

 * 1) "Action"
 * 2) "The Life & Death of Lex Luthor"
 * 3) "Neverending"

BLACKEST NIGHT

 * 1) "Black Hand"
 * 2) "Immortal"
 * 3) "Lantern"
 * 4) "Annihilation ''
 * 5) "Rebirth"

Brightest Day

 * 1) "Reborn"
 * 2) "Aftermath"
 * 3) "New Justice"
 * 4) "Divergence"
 * 5) "Convergence"
 * 6) "Loose Ends"
 * 7) "Homecoming"

Generations

 * 1) "Son of Superman"
 * 2) "Batman Beyond"
 * 3) "Justice Unlimited"

DC One Million

 * 1) "Millenium"
 * 2) "Future's End"
 * 3) "Legends"

Links

 * Full Reading Order