00529cam a2200181 4500 1104458413 TxAuBib 20200211120000.0 ||||||s2002||||||||||||||||||||||||und|u 9780448095028 0448095025 TxAuBib Carolyn Keene. The hidden staircase. New York : Grosset & Dunlap, 2002. 20200211. http://openlibrary.org/books/OL17080687M/The_hidden_staircase