SUPERMAN by Grant Morrison Reading Order

[ALL-STAR SUPERMAN]

• ASS #1 - "...Faster..."
• ASS #2 - "Superman's Forbidden Room"
• ASS #3 - "Sweet Dreams, Superwoman"
• ASS #4 - "The Superman/Olsen War"
• ASS #5 - "The Gospel According to  Lex Luthor"
• ASS #6 - "Funeral in Smallville"
• ASS #7 - "Being Bizarro"
• ASS #8 - "Us Do Opposite"
• ASS #9 - "Curse of the Replacement Superman"
• ASS #10 - "Neverending"
• ASS #11 - "Red Sun Day"
• ASS #12 - "Superman in Excelsis"

[SUPERMAN & THE MEN OF STEEL]

• Action Comics #1 - "Superman Versus the City of Tomorrow"
• Action Comics #2 - "Superman in Chains"
• Action Comics #3 - "World Against Superman"
• Action Comics #4 - "Superman & The Men of Steel"
• Action Comics #5 - "Rocket Song"
• Action Comics #6 - "When Superman Learned to Fly"
• Action Comics #7 - "Superman's Doomsday Decision"
• Action Comics #8 - "The Collector of Worlds"
  

[BULLETPROOF]

• Action Comics #9 - "The Curse of Superman"
• Action Comics #10 - "Bulletproof"
• Action Comics #11 - "Superman's New Secret Identity"
• Action Comics #12 - "Return of the Forgotten Superman"
• Action Comics #0 - "The Boy Who Stole Superman's Cape"

[AT THE END OF DAYS]

• Action Comics #13 - "The Ghost in the Fortress of Solitude"
• Action Comics #14 - "Superman's Mission to Mars"
• Action Comics #15 - "Superman at the End of Days"
• Action Comics #16 - "The Second Death of Superman"
• Action Comics #17 - "Superman & The Fiend From Dimension 5"
• Action Comics #18 - "Superman's Last Stand"

[SUPERMAN & THE AUTHORITY]

• #1 - "All Our Tomorrows" 
• #2 - "One Soul at a Time"
• #3 - "Grimdark!"
• #4 - "Widescreen"