This is not the time to take your Kindle camping, people Readers will be unable to download their purchased books or buy new ones without a computer handy if they fail to update their Amazon Kindles by Wednesday. Users of Kindle models older than 2013 will need to apply an update over their device's wireless connection to install a critical fix. Those who do not will be kicked from Amazon online properties, including the book store, and their cloud library of purchased books and documents. Amazon has sent emails to user account inboxes warning to update. It has not explained...