The "Dungeon Trap Handbook" contains 38 tables for the fantasy game referee to use to roll up random traps for unwary adventurers. It is especially useful for designing on-the-spot traps for a party that has had things too easy up to now. Starting with Table 1, the referee will roll percentile dice, and the result will lead him/her to the next table, the result there will lead to the next table, and so forth for a half-dozen rolls until the trap is complete.
Subsets of the tables can be used to generate the color, smell, taste, and effect of unknown potions or mystical fountains or sacred wells that adventurers are foolish enough to drink from; or they could be used for the effects of magical spells gone awry. A very versatile little booklet.