Books like Complete Handbook of Voice Training
Richard Alderson
Complete Handbook of Voice Training is 255 pages, about 4 hours 41 minutes at 250 words a minute.
7 books to read next
How long each takes
The Diagnosis & Correction of Vocal Faults 3.9 h 
Ganamrutha Varna Malika 2.2 h The Voice of the Mind 6.7 h 
Training Tenor Voices 3.2 h 
Singing for Dummies 6.8 h 
Basics of Vocal Pedagogy 5.7 h The Foundations of Singing 2.2 h Bar height shows length. Estimated at 250 words a minute.