This was possibly the thickest book that Calvin had ever encountered in his entire life.
Written on the surface of the book was the word, "Bestiary". The font used to write the word made it look domineering and dashing, but the dust that covered its surface made it obvious to Calvin that the book hadn't been opened for at least several months now.
Calvin opened the book and a short introduction was on the very first page.
[Author Unknown]
[Let this book be the guide for the lost souls of the future generation. Written within this book are accurate information pertaining to the beasts that have appeared after the first Cataclysm.]
[However, one must never rely on a single source of information for advice when it comes to dealing with the beasts described in this Bestiary for mutations do happen...]