Making Books (1947). Producer: Encyclopaedia Britannica Films. Part of the Prelinger Archives collection. Source. Found via Casual Optimist.
There is just nothing I don't love about this documentary, and the process of making books!
'Making Books' is a 1947 documentary produced by Encyclopaedia Britannica Films about "writing, editing and mass production of books" - showing the book making process of the day from manuscript to finished, mass-produced book.