Hot off the press and available for free download:
Democracy within the Framework of the Inter-American Democratic Charter: the View from Academia and Civil Society (Spanish): http://www.idea.int/publications/democracy_within_the_framework/index.cfm
Published by: International IDEA, Asociación Civil Transparencia, the Carter Center and Unidad Andina para la Gobernabilidad Democrática, Embajada de Canadá.