From the back of the book:
"A fortress out of legend...
Helm's Deep, the legendary mountain fastness of the Rohirrim, is described within the pages of this sourcebook in unprecedented depth. Join Helm Hammerhand's brave warriors atop the mighty Deeping Wall, launch a valiant sortie against Orc-attackers, or explore the majesty of the Glittering Caves of Aglarond, where even the most jaded Dwarves have witnessed beauty beyond description. What's more, you can plot your heroes momentous campaigns with new rules for epic battles that take clashes between troops, companies, and entire hosts of soldiers to exciting new levels. Helm's Deep presents an absolute wealth of information for Narrators, players, and J.R.R. Tolkien fans alike.
Helm's Deep includes:
- More than four centuries of history and background, from the discovery of the Glittering Caves by the Dúnedain to Théoden King's decisive victory over the forces of Saruman during the War of the Ring.
- Statistics and background detailing the denizens of Helm's Deep, from the Master of the Westfold to the farmers of the Deeping Coomb.
- Ten detailed maps of Helm's Deep and its environs, including the Deeping Coomb, the Hornburg fortifications, and the Glittering Caves of Aglarond.
- A new mass combat system for The Lord of the Rings Roleplaying game featuring abstract and tactical rules, over two dozen sample units, 20 battle manoeuvres, and options for integrating your chronicle's heroes into the action."