No. The Library of Congress number is used in the same way as the Dewey Decimal Number: for shelf organization.
A shelf list card is an old style catalog card from the master shelf list file of a particular library. Shelf list cards often held more information regarding issue of magazines and journals, number of copies, sources of gifts, etc. than the public really needed to know. The shelf list cards were kept in call number order, and not open for public use. The public catalog card versions were filed by author or other main entry, title, and subject.
Yes it is
It is a library that is open to the public, with little or no restrictions on who can enter.
It's called the Dewey-decimal system.
McM is the shelf label for the lower aisle of the castle library. If you have the Library Slip, you can press this shelf to open the dungeon passageway.
fiction , non fiction , references , open shelf , reserved collection and computer section
If you have arrived there because of the information on the Library Slip, click on the shelf (McM) and the stairway to the dungeon will open.If you haven't gotten the Library Slip, you are wasting your time. Get the gold coin from the fountain, enter the museum, and find the Library Slip in the stack of books. Once you have it, the shelf in the library will open the hidden staircase.
It is the lower aisle in the royal library (castle, first floor right), and the shelf McM will open the dungeon entrance if you have the Library Slip.
Shelf.
You will have to use the gold coin from the fountain to get the Library Slip from the Mordred Museum. Once you have it, you can click the McM shelf in the castle library and open the secret stairway to the dungeon.
In the castle library (first floor, right) there is a shelf marked McM on the lower aisle. Press it to open the secret stairway to the dungeon.
Once you have used the gold coin from the fountain to enter the Museum, and recovered the Library Slip from the stack of books there, you can open the stairway to the dungeon by clicking the lower shelf (non-fiction aisle) in the castle library. It is marked McM.
"McM" is the shelf letter on the non-fiction (lower) aisle in the castle library (first floor right side). When you have the Library Slip, you can click the scroll on the "McM" shelf, and a stairway to the castle dungeon will open. (see related question)
Push on the shelf marked "Non-Fiction McM" on the lower aisle of the library. This is written on the library slip found at the Mordred Museum, which you need to open the passageway. Get the shiny gold coin from the fountain and pay your admission, and find the library slip in the stack of books.
The shelf marked McM in the castle library opens the hidden stairway to the castle dungeon. You can only click it if you have the Library Slip from the Mordred Museum. Get the gold coin from the fountain to pay your admission. The slip is in a stack of books. When you have the Library Slip, you can click on the McM shelf in the lower aisle of the castle library, to open the secret stairway to the dungeon.
The stairway into the castle dungeon is opened by clicking the McM shelf on the lower aisle in the castle library. You need the Library Slip from the Mordred Museum. Get the gold coin from the fountain outside, pay your admission, and find the Slip in a stack of books. Now the scroll in the library shelf will work, and you can enter the dungeon.