Tijuana 'Bibles'
Tijuana bibles were pornographic comic books produced in the United States from the 1920s to the early 1960s. Their subject is explicit sexual escapades usually featuring well known cartoon characters, political figures or movie stars (used without permission). Tijuana bibles were sold illicitly, often passed among soldiers and schoolboys.

Description from Wikipedia. Related site for info on Tijuana Bibles: http://www.tijuanabibles.org/