Books like لسان العرب
Muḥammad ibn Mukarram Ibn Manẓūr
لسان العرب is 491 pages, about 9 hours at 250 words a minute.
9 books to read next
How long each takes
The Republic 7.3 h 
The Politics 6.5 h 
Two Treatises on Government 7.2 h 
Don Quixote 9.7 h 
Discourses on Livy 8.2 h 
Ṣaḥīḥ Al-Bukhārī 26.1 h 
Oxford Picture Dictionary 5.6 h 
A Dictionary of the English Language 7.7 h 
The Medical Pocket-book 2.8 h Bar height shows length. Estimated at 250 words a minute.