00780cam a2200193 4500 681439290 TxAuBib 690528s1969||||||||||||||||||||||||eng|u 69012166 DLC DLC DLC TxAuBib Keene, Carolyn. The invisible intruder / v 46. New York : Grosset & Dunlap, [1969] 175 p : illus ; 20 cm. Her 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. Mystery and detective stories - JUV FIC. Her Nancy Drew mystery stories, 46.