Nice work but please consider fixing the cursor styling. It doesn't change to `pointer` when hovering over the books, which is what you'd expect as they are clickable. Then, when you click on a book to open the modal, the cursor does mysteriously change to `pointer` - and stays that way wherever the cursor is.
I agree that it shouldn't mysteriously be a pointer all the time, but using a pointer for the cursor is a preference, not a standard. In native apps (outside the web), the cursor is often not turned into a pointer when hovering clickable content.