Something you can try since you can't use it to read books right now anyway. Do a reset. Turn device completely off (not sleep), press and hold the home button, slide and hold the power button for about 5 secs I believe. This will reset the device to factory installed firmware. I know you just bought it but I can't find any mention of the 2.2.2 firmware. Highest I see mentioned is 2.2.1 for Japan. At the least all that will have happened is that you go through the setup procedure again.
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