From publisher blurb:
From the dungeons deep
beneath the haunted Ushirian Manor,
Castle Oldskull, the first fiends
are now unveiled at last …
In this mini-supplement tome you will find 25 unique dungeon encounters and 25 treasures, unearthed from the author’s Castle Oldskull setting, dungeon level 1. The encounters herein are specifically suitable for adventuring parties of the first or second levels of experience. Compatible statistics are provided for Basic, Expert, and Advanced editions of the world’s finest old school role-playing game.
These encounters were designed using the Gygaxian bestiary of 1977 and have been specially developed to reveal the extent to which classic monsters can be elaborated upon in order to highlight unexpected role-playing, combat, cross-encounter, and interaction opportunities. Each encounter has been created to offer a basic monster and treasure, while also offering an intriguing adventure hook leading to deeper insights into the cultures, secrets, and mysteries of the game world of Oldskull. Your players can ignore or explore these curious leads however they see fit, and in doing so their actions, inaction, questions and pursuits will likely compel you to weave a wider world around the hints, lore, and unique monster characterizations that are all provided here.
This mini-supplement can be used as a dungeon room key (to a map which you provide), or as a random monster lair generation table perfectly suited to a campaign with beginning players.