Ikea Billy Book Display Holder

I designed this clamp for the Ikea Billy bookshelves to display my books and manga.

I have a couple of Billys in my house and found that the newer ones shelves are slightly thicker than the older ones, so I made two versions. The model also has a really small lip on the top clamp that can slide under the books to help hold it in place for when you double stack books.

Old Billy Clamp is for ~19mm shelves
New Billy Clamp is for ~20.5mm shelves

Normal version holds up to 20mm books.
Light Novel version holds up to 29mm books.