The Book of Beasts is the written library of information for the team that consists of different mythos and non-mythos races, creatures, deities and other powers. There are subpages that are broken into the type of Beast, ranging from deities, animals, daemons and other types of creatures.
- Deities and Powers: Deities and Powers of the Mythos range from Elder Gods, Outer Gods, and backwoods individual powers. All things worshipped.
- Mythos Races: Various races that may or may not be human such as Tcho-Tcho (human offshoot), serpent men, elder things, etc.