The Books They Tried to Silence: A History of Literary Censorship

Last updated: November 6, 2026 · By Thomas Reed

Banned books history is the record of books that governments, religious bodies, schools, libraries, and other groups have tried to remove, restrict, or destroy. A book ban is the removal or restriction of a book from a library, classroom, or other public place. The earliest documented book ban in what is now the United States dates to 1637, and the practice has continued in new forms ever since. This guide traces that history, explains how challenges work today, and shows what the latest data says about censorship.

Key Takeaways

• The first book ban in what is now the United States is generally dated to 1637, when Puritan authorities suppressed Thomas Morton’s New English Canaan in present-day Quincy, Massachusetts.
• The American Library Association’s Office for Intellectual Freedom tracked 4,235 unique titles challenged in 2025, the second-highest total it has documented.
• The ALA’s list of the 150 most challenged books, covering 1990 through 2025, includes classics such as To Kill a Mockingbird.
• PEN America frames the recent wave of book bans as the worst since the Red Scare of the 1950s.

How Did Book Banning Begin?

The first documented book ban in what is now the United States is generally dated to 1637. Harvard Library’s research guide on the history of book banning places the event in present-day Quincy, Massachusetts, where Puritan authorities suppressed Thomas Morton’s New English Canaan.

That early case set a pattern that repeats across centuries. Authorities of every kind, including religious leaders, governments, and school boards, have used removal and restriction to limit ideas they considered dangerous, offensive, or politically inconvenient. The reasons change from era to era, but the tool stays the same.

What Does the Recent Data Show?

Book challenges reached a high level in 2025, according to the American Library Association. The ALA’s Office for Intellectual Freedom tracked 4,235 unique titles challenged that year, the second-highest total it has documented. A book challenge is a formal request to remove or restrict a title. A challenge becomes a ban only when the request succeeds.

Historians and free-expression groups use longer timelines to put these numbers in context. PEN America’s timeline of censorship episodes frames the recent wave of book bans as the worst since the Red Scare of the 1950s. The table below summarizes the key points.

How Does a Book Challenge Work?

Most challenges begin with a complaint from a parent, patron, or advocacy group and then move through a review process set by the library or school. The steps below describe the typical sequence, though the details vary by institution and location.

1. A person files a written complaint that names the book and identifies the passages or reasons behind the objection.
2. The library or school checks the complaint against its written selection and reconsideration policy.
3. A review committee or administrator reads the book and decides whether to keep it, restrict it, or remove it.
4. In many institutions, the decision can be appealed, so check the policy for deadlines and appeal rights.

If you are tracking a challenge, the written policy is the most useful document you can read. It tells you who decides, what criteria apply, and how long the process takes.

Why Are Books Challenged So Often?

Challenges usually center on a small set of themes, including race, sexuality and gender identity, sexual content, violence, and profanity. Challenged titles span genres and eras, from classic novels to recent young adult fiction. The ALA publishes its most-challenged lists so readers can see which titles draw the most complaints over time.

Many challenges reflect disagreement about what young readers should encounter, and others reflect concerns about representation. Because the same book can draw complaints from opposite directions, a challenge tells you more about the people filing it than about the book alone. The most controversial books ever written show how often this pattern repeats across literary history.

Which Famous Books Have Been Banned?

Many widely taught classics have appeared on challenge lists. The ALA’s 150th-anniversary list of the 150 most challenged books documented from 1990 through 2025 includes To Kill a Mockingbird by Harper Lee, which shows that even standard school reading can draw formal challenges.

Other famous examples show how censorship can shift with the political climate. Ray Bradbury’s Fahrenheit 451 is a useful case study because it is a novel about censorship that has itself been challenged. Read more in why Fahrenheit 451 was banned and the irony behind it. For a wider view of global cases, see seven banned books that sparked global controversies.

What Are the Effects of Censorship on Readers?

Censorship narrows the range of stories available to readers, especially in schools and public libraries that serve young people. When a title is removed, students and families lose a chance to read it, discuss it, and form their own judgments.

The impact is strongest for readers who have few other sources of books. Restrictions can limit access to stories about marginalized communities, which is why many advocates focus on protecting school and library collections. Diverse books also help readers build empathy by showing experiences outside their own.

How Can You Respond to a Book Ban?

You can respond by using the same public processes that challenges use. Participation at the local level usually has the most direct effect on library and school decisions.

• Read your library’s or school district’s written selection and reconsideration policy.
• Attend board or library meetings where challenged titles are discussed.
• Send a short written comment that explains why the book matters for readers.
• Read the challenged book yourself so you can discuss its content accurately.
• Ask whether a nearby library can provide a copy through interlibrary loan.

Why Does Banned Books Week Matter?

Banned Books Week is an annual event that highlights challenged and banned titles and the people who defend access to them. The ALA released its 150th-anniversary list of the 150 most challenged books during the 2026 event, which gives readers a documented record of challenges across more than three decades.

The event matters because it turns individual challenges into a public record. Lists, data, and timelines make it easier to see patterns that a single school board decision might hide.

Frequently Asked Questions

What is the earliest known book ban in the United States?

The first documented book ban in what is now the United States is generally dated to 1637. Puritan authorities in present-day Quincy, Massachusetts, suppressed Thomas Morton’s New English Canaan. Harvard Library’s research guide is a good starting point for the original context.

What is the difference between a book challenge and a book ban?

A book challenge is a formal request to remove or restrict a title. A book ban is the result when that request succeeds and the title is removed or restricted. Many challenges do not end in a ban, which is why challenge counts and ban counts are reported separately.

How many books were challenged in 2025?

The American Library Association’s Office for Intellectual Freedom tracked 4,235 unique titles challenged in 2025. That total is the second-highest the office has documented. Check the ALA’s latest release for updates and methodology.

Is To Kill a Mockingbird still banned?

To Kill a Mockingbird appears on the ALA’s list of the 150 most challenged books documented from 1990 through 2025. That list tracks challenges, not confirmed bans everywhere. Whether a copy is restricted depends on the specific school or library, so check local policy.

How can I find out if a book was challenged where I live?

Start with your library’s reconsideration records and your school district’s board meeting minutes, which often list challenged materials. Many districts post their selection and reconsideration policies online. National lists from the ALA can also help you compare local challenges with broader trends.

Conclusion

Banned books history shows that the urge to restrict books is old, but so is the response from readers, librarians, and writers who defend access. Knowing the dates, the data, and the processes behind challenges lets you take part in those debates with accurate information. Read widely, use the library’s own policies, and keep the record of challenges public.