A full Clean The Library clear starts with control, not speed. The library is large enough that random movement creates more work than it solves. Your first goal is to turn loose books into organized shelf progress, then use map knowledge, keys, magic, and co-op roles to finish the remaining areas.
Begin with the nearest shelf zone. Pick up a small stack, read the book destination, and place any book that belongs nearby. If a book points to another floor or distant shelf, carry it only when it fits your current route. Drop it in a readable staging pile near the path or shelf zone where it will be ready for a later pass. Books save on the floor, so staging can be part of the route when it stays organized.
After the first shelves are moving, use the map as a route guide. First-floor, second-floor, and shelf-section notes help with routing, but the live shelf label still decides the placement.
Move through the library in passes. The first pass clears obvious nearby matches. The second pass moves staged books to their target shelf areas. The third pass uses keys, magic, or teammate roles to solve harder travel and search problems. One missing book can wait while obvious shelves are still unfinished. Finish visible progress first, then return with a cleaner library.
If you are solo, keep piles small and purposeful. A solo player has to remember every staged pile, so each pile sit near the shelf or floor it belongs to. If you are in co-op, split the library into zones. One player can keep the first floor moving while another handles second-floor routes or key tasks. The team avoid moving the same books twice.
When the library looks almost done, change behavior. Stop making large new piles. Check shelves zone by zone, cycle stacks before leaving each shelf, and inspect small floor piles that were staged earlier. The final books often take longer than they because players keep running through the whole library instead of checking one zone at a time.
After a consistent full clear, start pushing harder goals. Ascend, 3-hour, 2-hour, 1-hour, and Pro Mode goals all depend on the same foundation: fewer wrong trips, readable piles, and a final-check routine that does not panic when only a few books remain.