Trope-a-Day: Great Big Library of Everything

Great Big Library of Everything: The Empire’s Repository of All Knowledge, which is exactly what it says on the tin. Apart from containing copies of every work in every medium published anywhere in the Empire and many of the unpublished ones too, it routinely sends out collections agents to make sure it has a copy of any work it can get its hands on anywhere else within its light-cone, too. (Such agents can be quite persistent. The Black Chamber does not like to take no for an answer.)