Księga Przeciwników Mordenkainena jest oparta na pismach słynnego czarodzieja pochodzącego ze świata Greyhawk

Podręcznik Dungeons And Dragons 5.0 Mordenkainens Tome Of Foes Limited Edition (ed. Angielska)

Mordenkainen's Tome of Foes is built on the writings of the renowned wizard from the world of Greyhawk, gathered over a lifetime of research and scholarship. In his travels to other realms and other planes of existence, he has made many friends, and has risked his life an equal number of times, to amass the knowledge contained herein.