The Comixology app allows comic book readers to purchase and view their books on multiple devices including the Apple iPad – many the same day they are in print. Comixology is a comic book store and reader in your hand with over 13,000 comics to choose from (500 issues are free!).
This is the app that I use to read my Marvel, DC and IDW weekly books and I highly recommend it! Watch a video about the app HERE.