The Lost City (B4), adventure for Basic D&D, by Tom Moldvay.
“Lost in the desert! The only hope for survival lies in a ruined city rising out of the sands. Food, water, and wealth await heroic adventurers inside an ancient pyramid ruled by a strange race of masked beings.
The module includes a cover folder with maps, and a descriptive booklet with a ready-made adventure for the DUNGEONS & DRAGONS Basic game. It also includes enough information to continue the adventure beyond level 3, using the DUNGEONS & DRAGONS Expert game rules.”
For character levels 1-3 and beyond.
MINT and NEW copies are print-on-demand editions.