Mod:Fallout: The Frontier/Legionary 451

Legionary 451 is a Northern Legion sidequest given by Head Scribe Quintillus. Quintillus wants you to go to the library and gather several controversial books.

It's also possible to start the quest by getting the book named "A Proper..." in the Portland Library main hall even before finish the quest Welcome to the Frontier.

Option 1 Destroy the books
If you choose to destroy the books you will receive Northern Legion fame and 600 bottlecaps

Option 2 Keep the books
Keeping the books will net you 60 bottlecaps and the Well Read perk. This perk gives you an additional skill point whenever you read a skill book similar to Comprehension.