Public Knowledge

Public Knowledge is a side quest in Fallout 4.

Detailed walkthrough
Asking Daisy in Goodneighbor about work reveals that super mutants have taken over the Boston Public Library and she'll pay to have them cleared out. A series of speech checks can be passed to increase the reward from 200 up to 400. She also requests the return of an Overdue book to one of the machines at the library.

There are two entrances to the library: an Advanced locked door on the west side of the building, or going through Copley Station. The library is filled with protectrons and turrets waging war against the invading super mutants. Regardless of which entrance is used, the robots will be hostile to the player as well, unless the player speaks to the intercom next to the door prior to entering and passes a speech check to convince it that they are an employee of the library. If this is done at the western door, it will unlock the door as well, meaning Copley Station can be completely avoided with one speech check.

Once inside, an announcement will broadcast saying that super mutants are coming in from the station and the robots will flock to fight them. Once the wave is cleared, then find one of the two book return machines to return the overdue book. After that, return to Daisy to complete the quest.

Bugs

 * If the Sole Survivor returns Daisy's book into any book return terminal outside of the library the quest will keep on telling to return the book in a terminal inside the library even after clearing it of super mutants and the quest tells to return to Daisy. However, this will not affect the quest, as once the Sole Survivor returns to Daisy, the quest will be completed.
 * If the Sole Survivor enters the library before starting Daisy's quest and cleans up the area, upon return there may be some super mutants present but even if you kill them all the quest doesn't have to update. Easy fix is to advance the quest using SetStage 0010b654 40.
 * There's a bug in which the quest wont start after talking to Daisy.She says all the dialogue and even tells you to return her book.But no book is given.And the quest isnt given.No known cause for how this bug happens and seems to be random.No known fix either aside from starting a new game.

Достояние общественности