Julie Campbell books in order
9 books in the catalogue, about 42 hours of reading in all; the shortest takes 4 hours and the longest 5 hours.
9 standalone books in the catalogue.
Standalone books
Trixie Belden and the Secret of the Mansion 4.4 h 
Ginny Gordon and the Missing Heirloom 4.6 h 
Trixie Belden and the Red Trailer Mystery 4.5 h 
Ginny Gordon and the Mystery at the Old Barn 4.6 h 
The Gatehouse Mystery 5.0 h 
Ginny Gordon and the Lending Library 5.2 h 
Trixie Belden and the Mysterious Visitor 4.6 h 
Trixie Belden and the Mystery Off Glen Road 4.4 h 
Trixie Belden and Mystery in Arizona 5.0 h