Core Prestige Classes (Barbarian, Bard, and Cleric)

From publisher blurb:

Prestige classes have taken a back seat to archetypes and hybrid classes of late. Presented are three new prestige classes built upon the core classes they represent. These prestige classes offering an accelerated method of gaining a secondary core class without the need to multi-class for several levels to gain the same functionality. The compromise is that each prestige class focuses on a particular class ability or two rather than granting all of the class features normally associated with the class in question. So if you want a sorcerer that can rage or a fighter that likes to pick up the lute to inspire his friends on occasion, check out these new prestige classes.