Grubb is one of the most influential 2nd Edition AD&D designers. His 1st Edition rule book Manual of the Planes spawned the PLANESCAPE campaign setting.
Jeff Grubb created two AD&D campaign worlds: The SPELLJAMMER and AL-QADIM campagn settings.
He is also co-creator of the FORGOTTEN REALMS and MYSTARA campaign settings.
Today, Grubb is an active blogger and maintains his webdiary at Grubbstreet.
He is also a member of the writing society Alliterates, a collective of former TSR game designers and novelists.
The Alliterates maintain a weblog at Alliterate News.