From the publisher:

Each week that SkeletonKey Games doesn’t release a PDF from one our other product lines, e-Adventure Tiles Weekly will present 10 new tiles compatible with e-Adventure Tiles. The tiles in each Weekly will flesh out smaller encounter areas from three or more different terrain types.

In the debut issue you will find --

• 5 Dungeon Prison tiles with a gated guard room and 14 cells. A combination of stone walls and iron bars keep prisoners in their place making a great setting for escape or rescue themed scenarios.
  
• 3 Alchemist Shop tiles to expand your Adventure Town. Features include a retail area, workshop, and living quarters with plenty of space for action.
  
• 1 Vermin Nest tile to add the "gross" factor to your cave adventures.
  
• 1 Desert Shrine tile with a raised platform and illuminated orb. This tile makes a great objective hidden within Desert Ruins or Bluffs.