Joan Holub books in order
16 books in the catalogue, about 42 hours of reading in all; the shortest takes 33 minutes and the longest 5 hours.
16 standalone books in the catalogue.
Standalone books
Break-Out at the Bug Lab 53 min 
The Garden That We Grew 35 min 
Why Do Dogs Bark? 53 min 
The Gingerbread Kid Goes to School 33 min 
Who Was Johnny Appleseed? 1.9 h 
Who Was Marco Polo? 1.9 h 
Athena the Wise 4.6 h 
Medusa The Mean 4.6 h 
Pandora the Curious 4.6 h 
Who Was Babe Ruth? 2.0 h 
Goddess Girls Pheme The Gossip 3.5 h 
What Was the Gold Rush? 1.9 h 
Cinderella Stays Late 3.5 h 
Rapunzel Cuts Loose 3.5 h 
What Were the Salem Witch Trials 2.1 h 
Pallas the Pal 5.0 h