Haunted Castle on Hallows Eve (Magic Tree House, No. 30)
By Unknown Author.
Description
Once again, Merlin needs Jack and Annie's help. So the two time travelers will have to put off choosing their costumes for Halloween and return to Camelot for another important mission. This time, Merlin wants them to put a duke's castle in order, or else the entire kingdom will be in danger. And they will need their special skills as Master Librarians and Magicians of Everyday Magic to succeed. - from Amzon
ISBN(s)
0375860908, 8925654326, 9780375860904