wasn't bwonsamdi a dark troll that prelates the first troll empire and the night elves? (thats one of the theories of bwonsamdi origins), trolls are the older mortal race in azeroth, they already existed as a race in the times of the black empire, likely the race trolls evolved from existed way before the formation of the black empire in azeroth (another theory is bwonsamdi being a member of that race).
also every single operative/agent on that book is already known(aside from the book writer)