Forgotten Realms
The "Campaign Set" (often referred to as the "Grey Box") was later released in 1987 as a boxed set of two source books ("Cyclopedia of the Realms" and "DM's Sourcebook of the Realms") and four large maps, designed by Greenwood in collaboration with author Jeff Grubb. The set introduced the campaign setting and explained how to use it, and reserved space on the map for SSI's Gold Box computer role-playing games set in the Forgotten Realms.
Jeff Grubb
Grubb was a consultant on the first edition of "Unearthed Arcana", and authored the first edition of the "Manual of the Planes". Grubb contacted Ed Greenwood, author of numerous articles in "Dragon" about his home campaign setting, and soon Greenwood began sending Grubb packages full of maps and background information; this collaboration resulted in the publication of the Forgotten Realms campaign setting beginning with the "Forgotten Realms Campaign Setting" (1987). He is the designer of the "Spelljammer" campaign setting, and the Al-Qadim setting. Grubb felt that Al-Qadim was well received because the designers had managed to hide the setting's potential from TSR's executives.