@cygnoir Here's how to add the bookshelf page to the main menu.
- Go to Design → Edit Custom Themes.
- Click Moondeer's Bookshelves followed by content/bookshelf.md.
- Add a new line with
menu = "main"right below the line
type = "bookshelf".
- Click Update Template and wait for your site to rebuild.
- Celebrate! 🎉