This fun little tome is a GM utility for use during regular play when either too many good things happen to the players due to luck or just whenever the GM feels they need a little push to remind them that success is fleeting. This book consists of portable encounter and campaign modification ideas that can be used with, or at least tailored to, virtually any level party. There are several different angles to each set of dirty tricks, depending on how the GM wants to use them.
Dirty tricks are intended to create great players. That is and should be the only reason a GM springs such things on them. It also has the effect of creating a great game, where even mundane tasks cannot be taken for granted, and boredom is rare.
Bill Webb's Book of Dirty Tricks is system neutral with Pathfinder RPG notes.