There is another deal on Amazon Local – get $10.00 off a $20.00 Kindle Textbook. (if you don’t see offer, try look at Boston offers)
Voucher will expire if not used towards the purchase of a Kindle Textbook at Amazon.com by September 14, 2012.
Voucher is valid for a $10 discount off the price of any 1 eligible Kindle Textbook $20 or greater; customer will be responsible for payment to Amazon.com for final price of Kindle Textbook after discount, plus applicable taxes. All Kindle Textbooks that are eligible for this promotion will have the following message on the product page: Kindle Textbook Promotion: This book qualifies for Kindle Textbook promotions.