Books like Chakra Workbook
Pauline Wills
Chakra Workbook is 128 pages, about 2 hours 21 minutes at 250 words a minute.
10 books to read next
How long each takes
Chakras 2.3 h 
Chakras for Starters 2.5 h 
Wheels of Life 9.4 h 
Meditation 5.0 h 
The Chakra Handbook 3.6 h 
Journey of Awakening 7.3 h 
Theories of the Chakras 5.4 h 
A Chakra & Kundalini Workbook 4.7 h Yatharth Geeta - Shreemad Bhagwad Geeta 7.1 h 
Voluntary Controls 2.9 h Bar height shows length. Estimated at 250 words a minute.