When a Wired writer discovered a glaring typo in the Kindle edition of Stephen Hunter‘s new novel, I, Sniper, he also uncovered some unexpected facts about Kindle typos.

When journalist Steven Levy reported the Kindle typo to the publisher, Amazon.com quickly repaired the file. However, the company will not update the file for Kindle users who bought the book without permission from the Kindle customer. The policy prevents the kind of Kindle library tampering that angered Kindle users last year.

Here’s more from the Wired article: “According to Amazon.com’s Drew Herdner, ‘When we find a copyediting or formatting error in a book, we ask the publisher for a new file and replace the one in the Kindle Store so that new purchases of the book do not have the error. We will update the file for a book a customer has already purchased only when the customer asks us to.’”