Books like The Dark Knight Returns
Frank Miller, David Mazzucchelli, Lynn Varley
The Dark Knight Returns is 197 pages, about 3 hours 37 minutes at 250 words a minute.
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How long each takes
Batman 6.8 h 
JLA 3.5 h 
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Warrior's Refuge 2.1 h 
Coraline 3.2 h 
Claudia and Mean Janine 3.2 h 
Teen Titans Go! 1.3 h 
Astro Boy 3.8 h 
Angel 1.7 h 
Ultimate Iron Man Volume 1 2.4 h 
Astonishing X-Men 2.6 h 
El Deafo 4.4 h Bar height shows length. Estimated at 250 words a minute.