Spiral Bound Book Name Tag

I made this clip on name tag for my Son's school class. Each child has one of the books shown with their name only written on the front, the problem is that when stacked in the book shelf, the names can not be read and each book needs to be pulled out until the correct one is found.

The Spiral is made with a plastic wire diameter of about 2.5mm, and a total diameter across of about 23mm

It was made to be a bit hard to clip on so that it shouldn't fall off easily, but this can sometimes bre