The Magonium Mine Murders

The Magonium Mine Murders is a sandbox-style murder-mystery scenario (a "cluebox") designed for use with Old-School Essentials. Instead of having a central narrative, it presents the people of the valley, their schemes, and the places and things they fight over, then lets the players figure out what's going on and what to do about it. It's a sandbox full of clues. It's a ... cluebox?  
This 24-page zine includes multiple plots and conspiracies, over a dozen NPCs, a mini-dungeon, new monsters and magic items, a colour cover by Ed Bickford, and more.