Shel Silverstein books in order
15 books in the catalogue, about 61 hours of reading in all; the shortest takes 53 minutes and the longest 19 hours.
15 standalone books in the catalogue.
Standalone books
Falling Up 3.2 h 
Uncle Shelby's ABZ Book 1.5 h 
Lafcadio, The Lion Who Shot Back 2.1 h 
The Giving Tree 1.1 h 
Uncle Shelby's A Giraffe and a Half 53 min 
Who Wants a Cheap Rhinoceros? 1.1 h 
Where the Sidewalk Ends 3.2 h 
The Missing Piece 1.9 h 
A Light in the Attic 3.2 h 
The Missing Piece Meets the Big O 1.8 h 
Imagine 11.4 h 
Prentice Hall Literature--Timeless Voices, Timeless Themes--Copper Level 6.2 h Prentice Hall Literature--Timeless Voices, Timeless Themes--Silver Level 18.7 h 
Runny Babbit 1.6 h 
Every Thing on It 3.7 h