A drug compendium (like the Physicians' Desk Reference, or PDR) is a book that lists all the different pharmaceuticals, and a bunch of things that a medical professional might need to know about them.
The collective noun is a compendium of books.
Classic Compendium was created in 2005.
Classic Compendium happened in 2005.
Compendium Books was created in 1968.
Compendium Books ended in 2000.
Monstrous Compendium was created in 1989.
Rules Compendium was created in 2007.
For my birthday I was given a compendium of magical tricks.
Spell Compendium has 288 pages.
Spell Compendium was created in 2005-12.
Compendium Maleficarum has 345 pages.
Wizard's Spell Compendium was created in 1996.