The Anboran series is a great addition to my girls' book collection. They are well-written and well-illustrated. I also appreciate the author's value of his readers as he and his team readily rectified a unfilled request. It was of the utmost importance to them that the request was met, and I appreciated their prompt attention to the matter. This hiccup did not at all warrant any less than a 5-star rating.
I would suggest adding a personalization field at checkout, so that any custom autograph requests can be in text on the order invoice. This may make it easier for both the author and customer.