Books like Bad Language
Lars-Gunnar Andersson, Peter Trudgill
Bad Language is 208 pages, about 3 hours 49 minutes at 250 words a minute.
7 books to read next
How long each takes
An Introduction to Sociolinguistics 7.5 h 
Sociolinguistics 4.9 h 
Sociolinguistic Patterns 6.3 h 
Holy Shit 6.2 h 
Language and Gender 5.2 h 
Sociolinguistics 2.3 h 
The Development of Language 9.5 h Bar height shows length. Estimated at 250 words a minute.