Clean The Library gets easier when you stop thinking about the map as one giant room. Read it as shelf zones connected by travel routes. A book is easiest to manage when it is placed near you, staged near where it belongs, or carried because it fits the route you are already taking.
Start with the floor you are on. If several books belong to nearby shelves, finish those before moving upstairs or across the library. Moving between floors is expensive when you do it for a single book. It becomes efficient when the stack contains multiple books that belong in the same direction or when a route tool makes the trip faster.
Map pages describe a first floor, a second floor, and shelf-section references. They help with planning, especially when you are learning where shelf letters sit. Still, the current in-game label is the authority. If a book label, shelf sign, or live prompt differs from a static page, follow the game. This matters in a game that has already updated book-save behavior and can adjust routes over time.
Use staging piles at floor transitions. If you find second-floor books while working the first floor, place them in a readable pile near the path that leads upward instead of mixing them with first-floor books. When you finally go upstairs, carry a stack that belongs there. The same rule works in reverse for books that need to return to a lower area.
The map is less helpful during active placement. If the shelf is in front of you, cycle your stack before checking a separate reference. If another carried book belongs nearby, place it. Map checks help when you are deciding where to travel next; stack cycling helps when you are already at the shelf.
In co-op, map navigation works best with clear jobs. One player owns a floor, another owns a shelf section, and a runner moves staged books between floors. If every player uses the map to chase the same route, the team duplicates work. If each player owns a zone, the map becomes a shared plan.
For timed clears, map memory saves searches. You do not need to memorize every shelf before playing, but you should remember which direction common zones sit and where your staging piles are. The fastest route uses fewer reference checks, and each check should change the next few trips.