history Steading of the Hill Giant Chief, Glacial Rift of the Frost Giant Jarl, and Hall of the Fire Giant King were written by Gary Gygax. In 1978, Steading of the Hill Giant Chief became the first adventure module published by TSR. Gygax wrote them to take a break between writing the original Monster Manual (1977) and Player's Handbook (1978). The covers for Steading and Hall featured drawings by David C. Sutherland III. David A. Trampier drew the Glacial Rift cover. The cover of Against the Giants features a painting by Bill Willingham. Interior art was provided by David A. Trampier, Jeff Dee, David S. LaForce and Erol Otus. The "Giant" modules were set in the Greyhawk campaign setting, and formed the lead-in to an overall campaign that then continued on an odyssey into the Underdark. These adventures included the "Drow" series of modules, Descent into the Depths of the Earth, Shrine of the Kuo-Toa, and Vault of the Drow. The campaign finally culminated with module Queen of the Demonweb Pits. Steading and Glacial Rift were eight pages long, while Hall was 16 pages in length, and each featured an outer folder. The omnibus collection combination module Against the Giants was 32 pages long, and featured two outer folders. Against the Giants was revised and reprinted in the 128-page supermodule Queen of the Spiders in 1986 in combination with the three "Drow" series modules, and Queen of the Demonweb Pits. Hall of the Fire Giant King marked the first time that Dungeons & Dragons players encountered the drow; game statistics for the drow first appear in the module, although drow are mentioned in the 1977 edition of the Monster Manual.<ref>Gygax, Gary (1977,1978). Advanced D&D Monster Manual. TSR. p.39. .</ref> At the time these modules were released, each Dungeons & Dragons module was marked with an alphanumeric code indicating the series to which it belonged. The earlier modules have module codes G1, G2, and G3 respectively, and the combined module's code is G1–3. The "G" in the module code represents the first letter in the word "giant". The Original TSR Product Codes for these 3 modules are 9016, 9017, and 9018 respectively. Released in 1999 to commemorate the 25th anniversary of TSR, Against the Giants: The Liberation of Geoff provided a set of adventuring materials that expanded on the original three modules. 1999 also featured a reprinting of the three modules