The Filing Cabinet is a list of resources for further study about topics related to The Books of Binding.
Creature Reference
The Element Encyclopedia of Magical Creatures: The Ultimate A-Z of Fantastic Beings from Myth and Magic by John and Caitlin Matthews
Faeries by Brian Froud and Alan Lee
Giants, Monsters, & Dragons: An Encyclopedia of Folklore, Legend, and Myth by Carol Rose
Weapon Reference
The Writer’s Guide to Weapons: A Practical Reference for Using Firearms and Knives in Fiction by Benjamin Sobieck