“Centro de Competencia en Comunicación para América Latina” in Columbia has just published a book on media use in politics. in short chapters (6-10 pages) media experts analyze performances and communication strategies various latin american presidents are using to be in touch with their voters via radio and television.

Rincón, Omar (Ed.) 2008. Los Tele-Presidentes: cerca del pueblo, lejos de la democracia (Die Fernsehpräsidenten: nah am Volk, aber weit weg von der Demokratie) Bogotá: Friedrich Ebert Stiftung. 171 S. you can download the book here.

and just a gimmick aside – the usa as well do trust in direct mediation. not a book but a link instead to president george w. bush’s weekly radio address.