The Hardy Boys, brothers Frank and Joe Hardy, are fictional characters who appear in several mystery series for children and teens. The series revolves around teenagers who are amateur sleuths, solving cases that stumped their adult counterparts.
The Great Airport Mystery is Volume 9 in the original The Hardy Boys Mystery Serries published by Grosset and Dunlap.
This book was written originally in 1930. Between 1959 and 1973 the first 38 volumes of this series were systematically revised. The original version of this book was rewritten in 1965 resulting in two different stories with the same title.
The view should solve the mystery of the placement.