"11/22/63" is a novel written by Stephen King and published in 2011. It is a work of speculative fiction that combines elements of science fiction, historical fiction, and thriller genres. The novel's title refers to the date November 22, 1963, which is a significant date in American history as it marks the assassination of President John F. Kennedy in Dallas, Texas.

The story follows Jake Epping, a high school English teacher in modern-day Maine, who is introduced to a time portal located in the back of a local diner. The portal transports him to the year 1958, and Jake is presented with an opportunity to prevent the assassination of President Kennedy. He embarks on a mission to change the course of history and prevent the tragic event from occurring.

As Jake explores the past, he becomes deeply immersed in the culture and politics of the late 1950s and early 1960s, including events such as the civil rights movement and the Cuban Missile Crisis. Along the way, he encounters various challenges and dilemmas, including the potential consequences of altering history and the ethical implications of his actions.

"11/22/63" has been praised for its intricate plotting, well-developed characters, and its ability to blend historical events with elements of suspense and time travel. It also delves into themes of fate, destiny, and the consequences of meddling with the past.

While the novel has received critical acclaim and is considered one of Stephen King's notable works, like many books that explore historical events or challenging themes, it has also faced some controversy and challenges in certain educational or public library settings. Some readers and organizations may object to certain content or themes in the book, but it's important to remember that debates over the banning or challenging of books often revolve around issues of censorship, freedom of speech, and the interpretation of content, and opinions on these matters can vary widely. Many people believe that books should not be banned or restricted and that readers should have the freedom to make their own choices about what to read and how to interpret literary works.