The Dark Powers of Tolkien

The Dark Powers of Tolkien (ISBN 978-1684127177) is an illustrated reference work by David Day, and was published on February 26, 2019 by Thunder Bay Press.

It serves as a compendium of villains of Middle-earth, from the works of J.R.R. Tolkien. It also includes timelines, genealogies, and commentary on the source material, as well as related real-world stories.