From jacket flap:
David Day’s A Tolkien Bestiary is a scholarly, definitive and enchantingly beautiful explanation of all the imaginary beasts, monsters, races, nations, deities, fauna and flora of J. R. R. Tolkien’s fantasy worlds of Middle-earth and the Undying Lands.
David Day has identified, analyzed and described 129 separate races. Each is lucidly explained in terms of its physical appearance, language, behavior and culture. A Tolkien Bestiary does not retell their stories..Further, there are 36 incomparable paintings in full color that vividly imagine the most important moments in the history of Middle-earth and the Undying Lands.