First gracing the digital pages of iOS devices in March, Marvel Unlimited is now available for Android. Part of the comic book publisher's digital subscription program, the app grants access to over 70 years of Marvel's greatest hits for $10 per month or $60 annually. Patrons looking to keep their data plans on a leash, or traveling beyond the reach of internet coverage, can stash books on their smartphone or tablet for offline reading. If your device is running Android 2.3.3 or higher (