General Juvenile Fiction in 1930

Hardy Boys 04: The Missing Chums by Dixon, Franklin W.

The Great Airport Mystery by Dixon, Franklin W.

Nancy Drew 02: The Hidden Staircase by Keene, Carolyn

Nancy Drew 01: The Secret of the Old Clock by Keene, Carolyn

The Bungalow Mystery by Keene, Carolyn

Nancy Drew 04: The Mystery at Lilac Inn by Keene, Carolyn