The Isle of Dread (X1), adventure for Expert D&D (blue cover), by David Cook and Tom Moldvay.
“The Isle of Dread is the first in a series of adventure modules for use with the DUNGEONS & DRAGONS Expert Rules. As the first D&D wilderness adventure published by TSR Hobbies, the Isle of Dread is designed as an instructional module to help novice Dungeon Masters design their own wilderness adventures.
This module contains maps and background material for the Isle, fifteen new monsters, and suggestions for further adventures. In addition, The Isle of Dread contains a map and background information for a large continent, and eleven smaller maps for encounters on the island itself. In this module, players will push their way through dark jungles and treacherous swamps to discover the lost plateau, and the final secrets of – the Isle of Dread!”
For character levels 3-7.
Note that the copy in POOR condition has a couple of missing pages.