Super-librarian spit & merge request

[Susie]

I noticed that this book only had 9 digits in the 10-digit ISBN slot. When I tried to update that to the correct one as per the 13-digit ISBN, it said that was already used by this book:
Harry Potter and the Sorcerer's Stone

So, therefore, it looks like these books should be merged. I checked and this edition appears to be a hardcover, so that info may need updating when they're merged. Please can a super do this for me?