Donald J. Sobol books in order
20 books in the catalogue, about 52 hours of reading in all; the shortest takes 1 hour and the longest 11 hours.
1 series and 19 standalone books in the catalogue.
Two-Minute Mysteries
3 books Two-Minute Mysteries length not known
More Two-Minute Mysteries 2.4 h Still More Two-Minute Mysteries length not known
Standalone books
Encyclopedia Brown, Boy Detective 1.9 h 
Encyclopedia Brown Strikes Again 1.8 h 
Encyclopedia Brown Finds the Clues 1.8 h 
Encyclopedia Brown Gets His Man 1.8 h 
Two-Minute Mysteries Collection 3.0 h 
Encyclopedia Brown Solves Them All 1.8 h 
Encyclopedia Brown Keeps the Peace 1.8 h 
Encyclopedia Brown Saves the Day 1.8 h 
Encyclopedia Brown Tracks Them Down 1.8 h 
Encyclopedia Brown Shows the Way 1.8 h 
Encyclopedia Brown Takes the Case 2.1 h 
Encyclopedia Brown Lends a Hand 1.8 h 
Encyclopedia Brown and the Case of the Dead Eagles 1.8 h 
Encyclopedia Brown and the Case of the Midnight Visitor 1.9 h 
Encyclopedia Brown Carries On 1.3 h 
Encyclopedia Brown Sets the Pace 1.6 h 
Encyclopedia Brown Takes the Cake! 2.2 h 
Imagine 11.4 h 
The Book of Children's Classics 6.9 h