How to add file(s) to an iPad in offline mode and read it in an app I would like to know if it is possible to add files to iPad (or iPhone), while offline, and be able to read those files in an iPad app.

Maybe this is possible by connecting the device to a computer? Or any other means?

PS: Need this functionality without jailbreak.
Do you mean something like this?
If you are talking about iBook and reading pdf files, this new OS X version use iCloud to sync your files on all devices and after syncing you can read them offline.