You have to jump in the middle of them then push to a side. then go through the hole
you do the puzzle
In the palace the right door
the guy at the door fives it 2 you
In the castle on main street go in the door on the first floor
it is x:21 y:81 -yepp
you trad a piece of paper for the password
you can talk to her in the door on the bottom of the windmill . go in she will be on the top of the inside of the windmill
THE LIBARY [1 floor in castle right door]
One common glitch in Poptropica's Astro Knights Island involves getting stuck at Mordred's castle door. To bypass this issue, try resetting the quest by leaving the castle and re-entering, or restarting the island entirely. If the glitch persists, consider contacting Poptropica's support team for further assistance.
you kno how you pressed MgM or w/e it was? go down there (the trap door) and click the switch :]
find a way to
Go in the castle and go on the door nearest to you on the first floor. That is the library. Look around and you will easily find the books.