00901cam a2200229 4500 1162057730 TxAuBib 19990521120000.0 690528s1969||||||||||||||||||||||||eng|u 69012166 /AC/r84 TxAuBib Keene, Carolyn. The invisible intruder / Carolyn Keene. New York : Grosset & Dunlap, 1969. 175 p. : ill. ; 20 cm. Nancy Drew mystery stories ; ; 46 Nancy Drew and her friends go on a ghost hunting expedition and become involved with a gang of thieves who concentrate their activities on collectors of valuable shells. 19990521. Detective and mystery stories Juvenile fiction. Nancy Drew mystery stories ; ; 46. TXKIP