The "Monster Girl Encyclopedia" (also known as "Monmusu") is a popular Japanese media franchise that includes various media, such as manga, anime, and video games.
The Monster Girl Encyclopedia is not a "R-18" or hentai book. While it contains nudity (often with strategic censoring via hair, steam, or objects) and mature themes regarding interspecies relationships, it is officially classified as a Fantasy Art Book / Bestiary . Volume 3 will adhere to the same rating as its predecessors. monster girl encyclopedia book vol 3 release date