noun
tome
TOHM/təʊm/
A large, heavy book, often scholarly.
The massive tome rests partly open, showing its thick pages and substantial binding.

Etymology
Greek tomos pictured a section as a piece cut off. Tome first meant one volume of a larger work, then came to suggest a large, ponderous book.
In context
he has a new book coming out which is a tome i've seen the print of it it's over 500 pages i think the footnotes are more than 100 pages
More examples
- The professor consults a dusty tome on ancient law.
- His latest cookbook is a six-hundred-page tome.
- Three leather-bound tomes fill the bottom shelf.
Forms
tome · tomes