The Isle of Dread (ISBN 978-0935696301) is an adventure for the Dungeons & Dragons role-playing game, and is also the name of the island where most of that adventure takes place. The adventure, which carries the module code X1, was originally published in 1981. Written by David "Zeb" Cook and Tom Moldvay, it is among the most widely circulated of all Dungeons & Dragons adventures due to its inclusion as part of the D&D Expert Set. The island itself has, at different times, been located in both the World of Greyhawk and Mystara campaign settings.