The mystery of the Aztec warrior. Originally published: New York : Grosset and Dunlap, 1964; London : Collins, 1971 _ The mystery of the disappearing floor. New York : Grosset and Dunlap, 1964 ; London : Collins, 1971 _ The wailing siren mystery. Originally published: New York : Grosset and Dunlap, 1968 ; London : Collins, 1972.
The Hardy boys in The mystery of the Aztec warrior, The mystery of the disappearing floor, The wailing siren mystery by Franklin W. Dixon. ISBN 0006922449. Published by Armada in 1983. Publication and catalogue information, links to buy online and reader comments.