The only down-side to this app is that it is available for the iPad only, and not other devices. To all the iPhone and iPod Touch users, try writing an angry e-mail to Nickelodeon and be sure to BCC UltimateKorra (contact@UltimateKorra.tk)
On the brighter side of this iBook's release ― Book 2 is closer than you think! Plus, we also received the title of the first episode from Season 2: Spirits.
With the upcoming 2013 San Diego Comic Con (SDCC) we're bound to receive some additional updates on Korra as well.