“Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.”
The most cherished and cited of all constitutional amendments, the First Amendment protects freedom of religion, speech, press, peaceable assembly, and petition. Although it was originally the third of 12 proposed amendments (the first two of which were not initially ratified), there is some rightful symbolism in the fact that this important amendment now heads the Bill of Rights.
The first amendment protects the freedom of speech and the freedom of the press. How does this relate to book banning and censorship? Here is a bit of background information on book banning.