If there are any John Lennon fans out there this may be for you. The John Lennon Letters was just released for the iPad and is available for download in the app store.
https://itunes.apple.com/us/app/the-john-lennon-letters/id579613944?mt=8
https://itunes.apple.com/us/app/the-john-lennon-letters/id579613944?mt=8