This article's content is accurate to the most recent public game version, 0.4.8d.
"A firsthand account of life in a world that suffered an apocalyptic catastrophe. Non-fiction."
The Second Day is a key item found in the Sealed Archives on the middle table of the three tables in a row on the west side. It actually serves no purpose, simply being one of the extra books used to distract the player from the correct answers to the puzzle.