The Keep on the Borderlands

Blurb

The Keep on the Borderlands is a Dungeons & Dragons module by Gary Gygax, first printed in December 1979. In it, player characters are based at a keep and investigate a nearby series of caves that are filled with a variety of monsters. It was designed to be used with the Dungeons & Dragons Basic Set, and was included in the 1979–1982 editions of the Basic Set. It was designed for people new to Dungeons & Dragons.
The Keep on the Borderlands went out of print in the early 1980s, but has been reprinted twice; a sequel was also made. A novelized version of the adventure was published in 2001. The module received generally positive reviews, and was ranked the 7th greatest Dungeons & Dragons adventure of all time by Dungeon magazine in 2004.