Starting Monday, 26 May, Comixology is giving away a new free digital comic each day. The promotion is going to run 20 days, and if you act fast you can still get Monday's free comic. The remaining 19 free titles have not been revealed, but we do know that Monday's freebie is a Batman title, Detective Comics #871:
A series of brutal murders pushes Batman's detective skills to the limit and forces him to confront one of Gotham City's oldest evils. Plus, when a figure from the past returns to Gotham, Jim Gordon must face some of his darkest demons.
Comixology's name is mud in many comics circles. Following their recent acquisition by Amazon, Comixology abruptly and unsurprisingly changed their existing app for the iPad and iPhone, removing the option to buy comics from inside the app. The change has been universally poorly received, resulting in the app achieving a 1-star customer rating in iTunes.