I love the idea of a limited design run ("we'll make three books, and stop there")
According to Wikipedia, a 4th book called "Jakandor: Land of Destiny" by Jeff Grubb was meant to be released:
http://en.wikipedia.org/wiki/Jakandor#Jakandor
I love the idea of a limited design run ("we'll make three books, and stop there")

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.