Alejandro Rosas R. (México, 1969). Historiador y escritor, es conductor del programa radiofónico de divulgación histórica Monitor en la Historia y colaborador del periódico Reforma. Es autor de Los presidentes de México así como de las biografías de Felipe Ángeles y Gustavo A. Madero, entre otras. Ha sido asesor histórico del Sistema Internet de la Presidencia de la República y escribió el guión del documental 1910, la revolución espírita.
> Alejandro Rosas R. (Mexico, 1969) is a historian and writer. He is the host of the historical radio program Monitor en la Historia and a contributor to the newspaper Reforma. He is the author of Los presidentes de México as well as biographies of Felipe Ángeles and Gustavo A. Madero, among others. He has served as a historical advisor for the Internet System of the Office of the President of the Republic and wrote the script for the documentary 1910, la revolución espírita.
Ericka Martínez studied visual arts at La Esmeralda. Her illustrations for stories and magazines have earned her several national and international awards.