Android or iOS. Examples of Marvel titles that will come with free codes include the Amazing Spider-Man, Avengers, Captain America, Mighty Thor and Invincible Iron Man. The new program continues the trend of comic book publishers invading the digital space like famished planet-eaters -- Dark Horse, for instance, recently made a deal with Barnes & Noble. Similarly, DC Comics inked an agreement with Amazon, a move that got some DC titles sent to the Phantom Zone by B&N. Judging from the positive response to digital codes included in the Ultimate Comics line and Avenging Spider-Man, Marvel expects the expanded code program to act like a radioactive spider bite for comic book stores, boosting repeat visits. Feel that tingling? That's your own Spidey sense telling you to swing past the break for Marvel's official PR.