Frozen reset Frozen on last screen opened; cannot return to home page or another website. Can't restore.

Hi,
I would try this :
reset the memory circuits on your iPad.
To do this : press and hold down both the Home button and the Sleep button (top right corner) until the Apple logo appears. This may take at least 10 seconds, so don't stop pressing the 2 buttons.
the iPad will re-initialize itself, but you won't loose any data or Apps. It just force-closes apps that may be frozen.

Do a factory reset to see if function is restored. You can also try holding the power button down to force a shut down.

Reset the App

1. Double-click the Home button. This minimizes the app and displays the iPad's multitasking screen.

2. Drag the stuck app upwards on the screen. This forces the app to close and removes it from the iPad's memory.

3. Press the Home button to display the iPad's home screen. Tap the app's icon to relaunch it. Any unsaved data, like words you typed in a document or progress in a game, is lost, but the app opens and should respond normally.

Try to hold the power button down until the tablet reboots.

When was the last time the tablet was turned off (not just put into sleep mode)?
To turn off the tablet, hold the power button for two or three seconds, then tap "shut down" when asked if you want to shut down your Kindle.
After the device has completely turned off, press the power button to restart.

Please reply with more information if this did not fix your problem!

See the following page for more information:
Quick Fix Slow or Frozen Screen

There usually is a reset pinhole where a straightened paper clip can be inserted to press an internal switch. this hole is usually on the edge. press and hold the switch for up to 10 seconds lightly. then the ereader should restart

You can return to factory settings. Press "on" button and hold it for 5 second. Then, during boot, press "on" button and hold it for 15-20 second. Repeat this steps 7 more times (8 totally). Then just turn on and watch the restored factory firmware from hidden area.

Double tap your home button (middle bottom). When you see your open apps press and hold on the overdrive app until it wiggles. Tap the red X to close it. Then, tap on the overdrive app icon again to reopen the app. You'll be at your bookshelf but, tapping on the book you were reading will return you to that page.