Ravenloft: Realm of Terror was written by Bruce Nesmith and Andria Hayday, with a cover by Clyde Caldwell, and was published by TSR in 1990 as a boxed set with a 144-page book, four large color maps, 24 cardstock sheets, and a transparent map overlay.
Realm of Terror (1990), by Bruce Nesmith and Andria Hayday, (ISBN 0-88038-853-6): Original Ravenloft campaign sourcebook.
Robh Ruppel worked for TSR for several years beginning in 1992, producing cover and interior art for products from the Forgotten Realms, Dragonlance, and Ravenloft settings, among others.