In 1920s Mexico, Constancio S. Suárez and José Guadalupe Posada created a series of illustrated booklets involving love letters. You had to buy the next issue to learn how the story would develop. A visual prequel to the Brazilian telenovela? :-)
artsandculture.google.com
José Guadalupe Posada Aguilar was a Mexican political lithographer who used relief printing to produce popular illustrations.