I’ve only done a few signings so far along with bookplates so I really haven’t had to put my hand to the test, but YA author John Green has committed to what is likely to be a mammoth task. He’s offered to sign every pre-ordered copy of his next book. That announcement shot the book up to #1 on Amazon and B&N. You can read about it here – http://www.publishersweekly.com/pw/by-topic/childrens/childrens-authors/article/47821-ya-author-john-green-to-sign-all-preorders-of-next-novel.html?utm_source=Publishers+Weekly%27s+PW+Daily&utm_campaign=9a707377a3-UA-15906914-1&utm_medium=email