Books like An Essay in Aid of a Grammar of Assent
John Henry Newman
An Essay in Aid of a Grammar of Assent is 501 pages, about 9 hours 11 minutes at 250 words a minute.
How long An Essay in Aid of a Grammar of Assent takes to read
6 books to read next
How long each takes
The Meaning and End of Religion 6.2 h 
The Language of God 5.6 h 
Valis 5.0 h 
Stages of Faith 6.1 h 
Dynamics of Faith 2.5 h 
Reasonable Faith 7.0 h Bar height shows length. Estimated at 250 words a minute.