Books like Effective Helping
Barbara F. Okun
Effective Helping is 331 pages, about 6 hours 4 minutes at 250 words a minute.
8 books to read next
How long each takes
The Skilled Helper 7.0 h 
Interviewing Strategies for Helpers 12.3 h 
The Helping Relationship 3.9 h 
Helping Skills 7.4 h 
Doing Good Better 5.0 h 
Intentional Interviewing and Counseling 8.1 h 
Interviewing and Change Strategies for Helpers 11.7 h 
Helping Skills 8.9 h Bar height shows length. Estimated at 250 words a minute.