Inside its thirty pages you'll find:
- A way to randomly determine over 105 empty room types, each defined and given a basic list of what items they contain!
 - The differences between a room and a chamber!
 - Ways in which empty rooms may be interesting!
 - A comprehensive listing of things that a room may contain!
 - 17 different categories of tricks!
 - A comprehensive listing of trick types!
 - Almost 100 example tricks!
 - Basic old school trap design, including triggers, special effects, duration, resets, and different categories!
 - Randomly generate thousands of different doors and a listing of over 60 door tricks!
 - Over 40 different surface tricks!
 - Randomly generate hundreds of thousands of different magical fountain effects!
 - 69 different interesting curses!
 - 100 different things that can be found in pits!
 - 100 strange and interesting things that can be found in corridors!
 - Randomly generate a nearly infinite number of traps!
 - 16 sample riddles and guidelines for creating your own riddles and puzzles!
 - Free!
 
It's companion piece is Treasure, a document allowing you to generate different interesting kinds of Treasure and it can be found here.
So, yeah, enjoy.