After securing the square, you'll move into a multi-story bookstore. This section is tight and requires careful room clearing. Work with your AI teammates, allowing them to draw fire while you flank or provide suppressing fire. Use your lethal equipment (frag grenades are excellent for clearing rooms) to soften up enemy positions before entering. Check every corner and doorway. Enemies will often hide behind shelves or pop out from unexpected angles. Be prepared for quick reactions. There might be a few civilians trapped inside; avoid shooting them. Once the building is clear, you'll typically regroup with your squad and proceed to the next area. Ensure you've collected any available ammunition or weapon pickups before moving on.
