Sex, Sin, and Blasphemy: A Guide to America's Censorship Wars is a non-fiction book by lawyer and civil libertarian Marjorie Heins that is about freedom of speech and the censorship of works of art in the early 1990s by the U.S. government. The book was published in 1993 by The New Press. Heins provides an overview of the history of censorship, including the 1873 Comstock laws, and then moves on to more topical case studies of attempts at suppression of free expression.