Is it just my iPad, or does iBooks not integrate with the iPad correctly? When I exit iBooks after uisng it's brightness setting to lower the brightness, the iPad's overall brightness will reflect this change until it's locked and reopened- though the brightness setting in the Settings app remains unchanged. The iPad brightness will return to its brightness setting in the Settings app once you lock and reopen the iPad, but then the brightness setting in iBooks will revert back to it's default setting, starting the whole cycle all over again. Very frustrating.