
| The theme of D&D was influenced by mythology, pulp fiction, and contemporary fantasy authors of the 1960s and 1970s. The presence of halflings, elves, dwarves, half-elves, orcs, dragons, and the like, often draw comparisons to the work of J.R.R. Tolkien. Gygax maintained that he was influenced very little by The Lord of the Rings (although the owners of that work’s copyright forced the name changes of hobbit to 'halfling', ent to 'treant', and balrog to 'Type VI demon [balor]'), stating that he included these elements as a marketing move to draw on the popularity of the work. |
| Gygax wrote the Advanced Dungeons & Dragons hardcovers Players Handbook, Dungeon Masters Guide, Monster Manual, Monster Manual II, Unearthed Arcana, and Oriental Adventures. Gygax also wrote or co-wrote numerous AD&D & basic D&D adventure modules, including The Keep on the Borderlands, Tomb of Horrors, Expedition to the Barrier Peaks, The Temple of Elemental Evil, Forgotten Temple of Tharizdun, Mordenkainen's Fantastic Adventure, Isle of the Ape, and all seven of the modules later combined into Queen of the Spiders. In 1980, Gygax's long-time campaign setting of Greyhawk was published in the form of the World of Greyhawk Fantasy World Setting folio, which was expanded in 1983 into the World of Greyhawk Fantasy Game Setting boxed set. Sales of the Dungeons & Dragons game reached $8.5 million in 1980. |