This particular book signed by Mary GrandPré is a 10th anniversary edition of Harry Potter and the Sorcerer's Stone. This book was personally signed by the illustrator at the 2017 Celebration of Harry Potter in Orlando in which Mary GrandPré attended. It is important to note that at this event, GrandPré signed books directly under her name rather than centered on the title page. This is a differentiating factor when comparing these books to her earlier signings. as of 2017, her signature also had been shortened, to where it looks like just an M and Y in her first name. Previous signings appeared to show her entire first name.