This issue is a variant of The Amazing Spider-Man (Marvel, 1999 series) #528 [Newsstand Edition]. There exist further variants.
All 12 issues of "The Other" storyline running through the Spider-Man books have a variant cover by Wieringo and Kesel depicting Spidey swinging through Doc Ock's arms and exploding pumpkin bombs; on each of the variant covers Spider-Man is wearing a different version of his costume. This is the black and white Retailer Edition sketch variant, which features Spider-Ham [Peter Porker], but without the background elements.
Recap of the events which led to the start of this issue with credits and indicia.
"The Other: Evolve Or Die" Part 12 of 12. Story continued from MARVEL KNIGHTS SPIDER-MAN (Marvel, 2004 series) #22.
Afterword to the "The Other" storyline by the editor-in-chief