From publisher blurb:
The next installment of the Master at Arms series doesn't deal with a weapon; instead it explores a piece of equipment that no self-respecting warrior would be caught without: the shield. The shield has never gotten its due in the d20 system, and the 3-level shieldbearer prestige class seeks to rectify that oversight. A shieldbearer brings a host of shield-related abilities into combat, both defensive and offensive. A skilled shieldbearer can use his shield to stop a giant's club cold, resist the effect of a dragon's breath, or simply smash his opponent's to flinders.
So give your fighters a reason to choose something other than a greatsword or a pair of scimitars, with Blackdirge Publishing and Master at Arms: Shieldbearer.
Master at Arms - Shieldbearer contains 7 pages of new d20 material, which includes the following:
A historical look at the shield
Author's design notes
The shieldbearer prestige class
Mazzog "The "Wall," an ogre shieldbearer mercenary
A new shield special ability: mighty bashing