Quiet Please!, or A-3, is the third mission in the Gloomy Manor in Luigi's Mansion: Dark Moon. The mission is about investigating the music coming from the Library. If the Dark-Light Device is already obtained, Luigi can take a shortcut to the Library by grabbing keys that enables direct access to the Library.
Luigi must go to the Foyer to activate the mechanism after the gears have been fixed by Professor E. Gadd. The mechanism lowers the aquarium that is blocked the entrance to the Lobby on the second floor. In the Lobby, there are two Greenies and a Slammer that comes out of the elevator when the two Greenies are defeated. Sucking up these two ghosts brightens up the room and enables access to the Library.
When Luigi enters the Library on the second floor, he notices a swarm of flying books at the center of the room and a piano playing by itself. The flying books start attacking him. During this, gold Spiders and mice appear. Luigi can use the Strobulb on them to turn them into gold bars. Luigi should then proceed into the Dining Room. In the Dining Room, Luigi needs to pull a cord to open up an elevator, which transports Luigi into the Kitchen. When Luigi tries to access the Library, Greenies block this doorway and fight against him. They use tools from the kitchen during this fight, which makes it harder for Luigi to use the Strobulb on them. After this fight, the doorway to the Library is opened, and Luigi is able to access the Library.
In the Library, Luigi finds a Poltergeist playing the piano. The Poltergeist then disappears and shoots books at Luigi. Luigi must shine the Strobulb twice onto it to expose it (the first time it occurs, the Poltergeist blocks itself with a book). After this Poltergeist has been defeated, two more appear simultaneously. After Luigi defeats all three Poltergeists, he is transported back at the Bunker.
American English: According to the Parascope, the ghostly activity in the north section of the Gloomy Manor is increasing! Now that you've recovered the gears, we should be able to investigate.
Names in other languages