Books for shelves

I really liked these shelves but I needed some books for them. I have both a normal and mirrored version so each row can be different. These are printed in PETG.

I took some of the books from this thing:
https://www.thingiverse.com/thing:2183224

There is a file with all unique books for each shelf. I split some up so I could use them on a desk or only take up half a shelf. I used some of the books from this thing:
https://www.thingiverse.com/thing:31037