Books like An Introduction to Sociolinguistics
Ronald Wardhaugh
An Introduction to Sociolinguistics is 408 pages, about 7 hours 29 minutes at 250 words a minute.
10 books to read next
How long each takes
Sociolinguistics 4.9 h 
Bad Language 3.8 h 
Sociolinguistics 2.3 h 
The Development of Language 9.5 h 
Keywords 5.8 h 
Language and Symbolic Power 5.5 h 
Sociolinguistic Patterns 6.3 h 
Language and Gender 5.2 h 
Reversing Language Shift 7.9 h 
Words on the Move 5.0 h Bar height shows length. Estimated at 250 words a minute.