Mordred is part of Arthurian legend, so try looking up "King Arthur" or "Camelot".
There are three informative, but not crucial, books in Arturus. Read them if you wish: # Library : "The Mystical Weapons of Arturus" # Library : "The Life of Mordred : A Cautionary Tale" # Secret Lab : Mordred's Journal
On Astro Knights island in the game Poptropica, Mordred's Lair is hidden in the castle. Inside the castle library (located on the right side of the first floor) collect the books "The Life of Mordred: A Cautionary Tale" and "The Mystical Weapon of Arturus" and click on the section of the library specified on your library card. A stairway will appear, leading you to Mordred's Lair.
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.
You go into Mordred's house an get the library slip, then you go into library and click on the scrunched up paper
If you go in the library in the castle you will see a book number on Mordred's library card , if you click that book you will open up a secret passage way to the dungeon. But be careful, you need the bookmark from Mordred's house before you go in the library.
Click on the sign for the McM section. You need to have Mordred's library pass to do so.
The McM is on the bottom floor in the library. You can click on the mcm if you have the library card. The library card is in Mordred's house museum.
You probably don't have Mordred's library books and card.
In Mordred's house
In the museum of Mordred click on the books in the chair and he gives u the library slip
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.)
It is not in the castle it is in the museum of mordred. click on the books beside his bed and the person in the purple outfit will give you mordred's library card. look closely at the underlined letters, mcm