you press on the books stacked on the bottom floor and the man will give it 2 u
The Library Slip is among a pile of books at the Mordred Museum. Get the gold coin from the fountain outside to pay your admission.
In the museum of Mordred click on the books in the chair and he gives u the library slip
If you are talking about the books in the Museum of Mordred, they are at the top next to the bed. When you click on them, the museum guy will tell you that the books have to stay where they are, but that you can have an old library slip of Mordred's.
The library slip. Get the gold coin from the fountain outside, and pay your admission. Get the library slip from the right side, and take it to the castle library (castle first floor right).
There is a gold coin in the fountain outside. Go in and get the Library Slip from the stack of books.
The LIBRARY SLIP is in the Mordred Museum. Get it by using the gold coin in the fountain outside. The CASTLE LIBRARY is in the castle, first floor right. On the lower aisle is the shelf McM that is listed on the library slip.
The museum is Mordred's house as he left it twenty years ago. Use the gold coin from the fountain to get inside. There is a library slip that refers to the Royal Library (in the castle, first floor right). (see related question)
In the lower aisle of the castle library, in the Non-Fiction section. You cannot use the secret passageway until you have the Library Slip from books at the Mordred Museum. Get the gold coin from the fountain and find the slip in the museum.
In the Mordred Museum, you are recovering only the Library Slip from the stack of books. This lets you access the dungeon in the castle library. (To get the key to Mordred's laboratory, see the related question.)
The shelf marked McM is on the lower (non-fiction) aisle, as shown on the Library Slip. You need the slip to use the staircase. Take the gold coin from the fountain to pay your admission to the Mordred Museum. The Library Slip is in a stack of books.
You need the Library slip from the Mordred Museum. To get it, recover the Gold Coin from the fountain outside. Once you pay your entrance fee, you can find the Library Slip in the stack of books just right of the museum operator.
Get the gold coin from the fountain to pay your admission. The immediate item is a library slip that will lead you to the castle library. (It is on the right side of the room.)