I wonder what she will be doing for herself that day or if her family or friends will be holding some kind of celebration for her. But you never know, she just might be using that day to write up the next and last book in the series.
By the way, the ones in the photo are - left: Hikaru Midorikawa (voice actor for Edgar) - center: the author, Mizue Tani - right: Nana Mizuki (voice actress for Lydia.) Photo was taken in October 2008 during interview for the animation series.
I will upload the translations for the next chapter in book 5 on that day and leave my personal message to the author, so anyone who wants to join in - please say your happy birthday to the author!