1. Open a book.
2. Select Print/Export
3. Select the very last section. It won't appear. If you deselect everything else, either the document will be blank, or the second-to-last-section will appear.
4. Select a bunch of previous selections, or all previous sections, and the last section. Oftentimes all pages will be blank. Either way, the last section never appears.
Some examples of books I tested this with:
- Logos Help
- Verbum Help
- Treasury of Scripture Knowledge