“The Vile Worm of the Eldritch Oak” is a Pathfinder adventure by Brave Halfling Publishing. I’m not familiar with that adventure, so I don’t know the narrative context for these maps. I do know that the artwork lives up to LZW’s pattern of excellence, without question. The package gives you battlemaps for three areas: the titular “eldritch oak” itself (cut away to reveal the small room inside), a torture chamber that apparently sits at a level below the oak, and the lair of the titular “vile worm” (who apparently lives below and is fed from the torture chamber). A bit more of a key or comments on how the artists envision the spatial relationship between the three areas would have been helpful for DMs like me who don’t know the storyline. If you want a 1" grid on the maps, use the PDF layers feature to turn on the grid layer; it’s off by default. JPG files are included for virtual tabletop users. The only things “missing” here are LZW’s famous isometric views, which always enhance their products. At any rate, this is a great map set, whether you intend to use it with the published “Vile Worm” adventure or just build your own scenario around this interesting set-piece.