You can return any Kindle book for a full refund, but there are some restrictions. Kindle books can only be refunded within seven days of the original purchase, and you can only refund purchases made on your Kindle immediately upon completion of the transaction. Refunds on other Kindle books and returns of borrowed books can be processed through Amazon.com’s digital content management system.
Most people don’t know this, but Amazon allows you to get a refund on a Kindle book you bought but wish you hadn’t. Instead of wasting time leaving a bad review, why not just get your money back?