Swords and wizardry is a curated and refined version of the original Dungeons and Dragons, making it a direct child of the Ur-RPG that spawned all the others. Its a true old school hack and slash, with terrifying monsters around every dungeon corner, and even more terrifying tables on every second page of the rulebook.
What the Library has:
Complete Rulebook - All the Rules needed to play Swords and Wizardry
The Lost Lands: The Lost City of Barakus - Explore an ancient underground city
The Lost Lands: The Lost City of Barakus Players Guide - Details of Endhome, the starting settlement for your players to peruse
The Lost Lands: Borderland Provinces - Play in the outer lands of a decaying decadant empire.
The Lost Lands: Borderland Provinces - Players Guide - A series of letters to introduce your players to the borderlands provinces.
The Lost Lands: Borderland Provinces - Players Gazetteer - Details of the Borderlands provinces campaign setting
The Lost Lands: Adventures in the Borderlands Provinces - A variety of adventures for the borderland provinces setting
The Lost Lands: The Sword of Air - A pile of content for the lost lands setting, including "The tomb of horrors on crack"
The Lost Lands: The Sword of Air - Player Killing sessions - For when your players really really annoy you.