From publisher blurb:
Grab a dungeon, add your favorite RPG system and go!
Each 0one's Page Dungeon features one dungeon, map and description, contained in one single page. The description is a complete adventure you can play as is (adding statblocks) or expand as you wish. Of course, being the whole adventure contained in half a page can’t be exhaustive, so only main guidelines are given.
These dungeons make perfect side treks as they are, and can become fully fleshed-out adventures with a little bit of work.
For each dungeon you get a color page, a print-friendly page, and a page containing only the dungeon with a blank space for your notes should you want build a new adventure from scratch.
The dungeon description contains usually keyed locations plus three additional paragraphs, helping you to insert the adventure in your own campaign.