Welcome from Virginia
Try go to home screen, double tap the home button. Some icons will show up at the bottom of your screen. Press any one until it shows a -beside the apps. Tap the - on ibooks, double tap the home screen, try opening the app again.
If that doesn't work try holding both your power and home button for about 15 seconds. The Ipad will power off , back on for a few seconds then off again while you are holding them.
Wait at least a minute, power your Ipad back on and try again n
Hope that helps
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