Tijuana bible
（重定向自Fuck books）
Tijuana bibles (also known as eight-pagers, Tillie-and-Mac books, Jiggs-and-Maggie books, jo-jo books, bluesies, gray-backs, and two-by-fours) were palm-sized pornographic comic books produced in the United States from the 1920s to the early 1960s. Their popularity peaked during the Great Depression era.