[1] The book also provides new feats, new alchemical and magical items, and also new gear options, many of which were adapted from older supplements such as the Dungeoneer's Survival Guide.

[1] The book also includes three prestige classes: the beast heart adept, which combines a druid's affinity for animals with similar skills to harness and befriend monsters; the trapsmith, a master of dealing with and placing magical and mechanical traps; and the dungeon lord, who has a variety of powerful abilities while in the character's own dungeon.

The book features monsters, including the ascomoid and rot grub swarm, and templates to import them into a dungeon or make them more deadly inhabitants.

Cover art was by Michael Komarck, with interior art by Steven Belledin, Miguel Coimbra, Daarken, Wayne England, Emily Fiegenschuh, Carl Frank, Brian Hagan, Jon Hodgson, Ralph Horsley, Warren Mahy, Torstein Nordstrand, David Roach, and Franz Vohwinkel.

[1] When deciding on equipment options for the book, the designers tried to focus on noncombat utility, and added items that help an adventurer deal with the sort of physical obstructions that are commonly found in dungeons.