From the back cover: The definitive d20 System resource for traps, tricks, puzzles, and poisons. - More than 60 complete descriptions of magic and mechanical traps, all beautifully illustrated. - Detailed guidelines on trap design and classification that organizes and streamlines the process of designing new traps and integrating them into your adventures. - Comprehensive rules for creating and using poisons. - Detailed listings of new poisons, natural and supernatural alike. - New prestige classes, including the trapmaster, roofrunner, and discreet companion. - A new NPC class, the thug. - New skills and feats, such as Urban Lore and Brew Poison. - New equipment and magic items. - The Thievery clerical domain, as well as new arcane and divine spells. - Tricks and techniques for disabling traps. - A comprehensive section on designing, developing, and integrating thieves' guilds into your campaign. - A chapter detailing a variety of mind-bending puzzles with which to confound your players, including logic puzzles, math puzzles, word puzzles, and chess puzzles, as well as physical challenges and obstacles to test your characters.