Books like Dharmasindhu
Kāśīnātha Upādhyāya
Dharmasindhu is 693 pages, about 12 hours 42 minutes at 250 words a minute.
10 books to read next
How long each takes
Bhagavad-Gita 3.4 h Forest of Enchantments 6.8 h 
The Pagan Book of Days 2.9 h If Truth Be Told 4.6 h 
Wicca For Life 6.3 h 
The Man Who Was a Woman and Other Queer Tales from Hindu Lore 3.3 h 
Vivekananda 6.4 h 
Vikram and the Vampire 4.2 h 
Wheel of the Year 2.9 h 
The Hindus 14.3 h Bar height shows length. Estimated at 250 words a minute.