Books like Head First SQL
Lynn Beighley
Head First SQL is 589 pages, about 10 hours 48 minutes at 250 words a minute.
7 books to read next
How long each takes
SQL for Dummies 7.9 h 
Sams Teach Yourself SQL in 10 Minutes 4.4 h 
SQL 3.8 h 
SQL for SQL Server 7.6 h 
Murach's MySQL 11.2 h 
The Manga Guide to Databases 4.1 h 
High Performance MySQL 8.8 h Bar height shows length. Estimated at 250 words a minute.