John Scalzi books in order
26 books in the catalogue, about 140 hours of reading in all; the shortest takes 31 minutes and the longest 14 hours.
2 series and 18 standalone books in the catalogue.
Old Man's War
22 books 1 
Old Man's War 5.7 h 2 
The Ghost Brigades 5.9 h 3 
The Last Colony 5.9 h 4 
Zoe's Tale 5.9 h 
The Human Division 7.9 h 
The End of All Things 7.0 h
Old Man's War 5.7 h 2 The Ghost Brigades 5.9 h 3 The Last Colony 5.9 h 4 Zoe's Tale 5.9 h After the Coup length not known
5 The Human Division 7.9 h A Problem of Proportion length not known
A Voice in the Wilderness length not known
Earth Below, Sky Above length not known
Hafte Sorvalh Eats a Churro and Speaks to the Youth of Today length not known
Tales From the Clarke length not known
The B-Team length not known
The Back Channel length not known
The Dog King length not known
The Gentle Art of Cracking Heads length not known
The Observers length not known
The Sound of Rebellion length not known
This Must Be the Place length not known
Walk the Plank length not known
We Only Need the Heads length not known
6 The End of All Things 7.0 h 7 The Shattering Peace length not known
The Interdependency
3 books
Standalone books
Lock In: A Novel of the Near Future 6.2 h 
Agent to the Stars 6.4 h 
Questions for a Soldier 31 min 
The Android's Dream 7.3 h 
The Sagan Diary 1.8 h 
Metatropolis 5.3 h 
The God Engines 2.5 h 
Fuzzy Nation 5.6 h 
Redshirts 5.9 h Human Division #1 1.7 h 
Unlocked 2.2 h 
Black Tide Rising 5.6 h 
Miniatures: The Very Short Fiction of John Scalzi 2.3 h 
The Best of Subterranean 13.8 h 
The Collapsing Empire 6.2 h 
Head On 6.2 h 
The Kaiju Preservation Society 5.4 h 
Starter Villain 5.0 h