The way the Loyola Notre Dame Library has divided up the circulating books is as follows: Books (or other items) with LOC call numbers beginning with...
A - M: are on the second level (second floor) - one level up from the main level.
N: are on the main level,
P - Z: are on the lower level (one floor down from the main level).
Sounds simple, right? Well, it is! There's only a few other details you need to remember:
First, the main level has only one call number range (N) of circulating books because the rest of the space is taken up with other things, including the Reference collection, which includes the entire range of LOC subjects, from A to Z. The Reference books are on the West side of the room, and the N range of circulating books is on the East side.
Second, the Juvenile circulating collection's call numbers also go all the way from A to Z, and it is also in its own special section, at the end of the stacks (the Southeast corner) on the second level.
Third, the 'R' section - medical, psychological and nursing - is in its own section at the end of the stacks (again, the Southeast corner) on the third level.
Here comes the last part - finding the book on the shelf! Go to the 'Shelf Order' tab.