David A. Adler books in order
9 books in the catalogue, about 8 hours of reading in all; the shortest takes 33 minutes and the longest 1 hour.
9 standalone books in the catalogue.
Standalone books
Cam Jansen and the Mystery of the Stolen Diamonds 1.1 h 
Cam Jansen and the Mystery of the Dinosaur Bones 1.0 h 
Cam Jansen and the Mystery of the Television Dog 1.1 h 
Picture Book of Martin Luther King 35 min 
Young Cam Jansen and the Lost Tooth 35 min 
Cam Jansen and the Catnapping Mystery 1.1 h 
Cam Jansen and the Birthday Mystery 1.1 h 
Young Cam Jansen 33 min 
Young Cam Jansen and the Zoo Note Mystery 34 min