Books like Essential Scrum
Kenneth S. Rubin
Essential Scrum is 496 pages, about 9 hours 6 minutes at 250 words a minute.
8 books to read next
How long each takes
Scrum 5.2 h 
Agile Project Management with Scrum 6.4 h 
The Professional Product Owner 7.0 h 
Agile Product Management with Scrum 2.9 h 
Kanban 4.8 h 
The Art of Community 7.2 h 
Agile Project Management For Dummies 7.9 h 
Agile Practice Guide 3.1 h Bar height shows length. Estimated at 250 words a minute.