From the back of the book:
100 Dungeons, 100 Pages. Each dungeon is illustrated and includes art, maps, descriptions, adventure hooks, and plenty of ideas for what sort of adventures you might have. Inside you’ll find fantastic worlds, such as:
The Mirror City: A broken magic mirror, reflecting a city as fractured as the glass.
The Aural Auditorium: Impossible to perceive by sight, with monsters whose bark is truly worse than their bite.
The Fortress on the Edge of the World: The front line of an impending invasion from another dimension.
The Rune: A massive rune of power carved into a mountain. What does it do? Where is it aimed?
...and 96 others!
Includes Kickstarter-exclusive content:
30 More Dungeons
Lists for creating dungeon content
Dungeon Generator