A Clockwork Orange is a novel by the English writer Anthony Burgess, published on 17 March 1962. It is set in a near-future society that has a youth subculture of extreme violence. The teenage protagonist, Alex, narrates his violent exploits and his experiences with state authorities intent on reforming him. The book is partially written in a Russian-influenced argot called "Nadsat", which takes its name from the Russian suffix that is equivalent to in English. According to Burgess, the novel was a jeu d'esprit written in just three weeks.

In 2005, A Clockwork Orange was included on Time magazine's list of the 100 best English-language novels written since 1923, and it was named by Modern Library and its readers as one of the 100 best English-language novels of the 20th century. The original manuscript of the book has been kept at McMaster University's William Ready Division of Archives and Research Collections in Hamilton, Ontario, Canada since the institution purchased the documents in 1971. It is considered one of the most influential dystopian books.

In 2022, the novel was included on the "Big Jubilee Read" list of 70 books by Commonwealth authors selected to celebrate the Platinum Jubilee of Elizabeth II.

Plot summary Part 1: Alex's world Alex is a 15-year-old gang leader living in a near-future dystopian city. His friends ("droogs" in the novel's Anglo-Russian slang, "Nadsat") and fellow gang members are Dim, a slow-witted bruiser, who is the gang's muscle; Georgie, an ambitious second-in-command; and Pete, who mostly plays along as the droogs indulge their taste for "ultra-violence" (random, violent mayhem). Characterised as a sociopath and hardened juvenile delinquent, Alex is also intelligent, quick-witted, and enjoys classical music; he is particularly fond of Beethoven, whom he calls "Lovely Ludwig Van".

The droogs sit in their favourite hangout, the Korova Milk Bar, drinking "milk-plus" (milk laced with the customer's drug of choice) to prepare for a night of ultra-violence. They assault a scholar walking home from the public library; rob a shop, leaving the owner and his wife bloodied and unconscious; beat up a beggar; then scuffle with a rival gang. Joyriding through the countryside in a stolen car, they break into an isolated cottage and terrorise the young couple living there, beating the husband and gang-raping his wife. The husband is a writer working on a manuscript entitled A Clockwork Orange, and Alex contemptuously reads out a paragraph that states the novel's main theme before shredding the manuscript. At the Korova, Alex strikes Dim for his crude response to a woman's singing of an operatic passage, and strains within the gang become apparent. At home in his parents' flat, Alex plays classical music at top volume, which he describes as giving him orgasmic bliss before falling asleep.

Alex feigns illness to his parents to stay out of school the next day. Following an unexpected visit from P. R. Deltoid, his "post-corrective adviser", Alex visits a record store, where he meets two pre-teen girls. He invites them back to the flat, where he drugs and rapes them. That night after a nap, Alex finds his droogs in a mutinous mood, waiting downstairs in the torn-up and graffitied lobby. Georgie challenges Alex for leadership of the gang, demanding that they focus on higher-value targets in their robberies. Alex quells the rebellion by slashing Dim's hand and fighting with Georgie, then soothes the gang by agreeing to Georgie's plan to rob the home of a wealthy elderly woman. Alex breaks in and knocks the woman unconscious, but when he hears sirens and opens the door to flee, Dim strikes him as revenge for the earlier fight. The gang abandons Alex on the front step to be arrested by the police; while in custody, he learns that the woman has died from her injuries.

Part 2: The Ludovico Technique

Alex is convicted of murder and sentenced to 14 years in prison. His parents visit one day to inform him that Georgie has been killed in a botched robbery. Two years into his term, he has obtained a job in one of the prison chapels, playing music on the stereo to accompany the Sunday Christian services. After his fellow cellmates blame him for beating a troublesome cellmate to death, he is chosen to undergo an experimental behaviour modification treatment called the Ludovico Technique in exchange for having the remainder of his sentence commuted. The technique is a form of aversion therapy in which Alex is injected with nausea-inducing drugs while watching graphically violent films, eventually conditioning him to become severely ill at the mere thought of violence. As an unintended consequence, the soundtrack to one of the films, Beethoven's Fifth Symphony, renders Alex unable to enjoy his beloved classical music as before.

The technique's effectiveness is demonstrated to a group of VIPs, who watch as Alex collapses before a man who slaps him and abases himself before a scantily clad young woman. Although the prison chaplain accuses the state of stripping Alex of free will, the government officials on the scene are pleased with the results, and Alex is released from prison.

Part 3: After prison Alex returns to his parents' flat, only to find that they are letting his room to a lodger, whom his parents treat like a new son. Now homeless, he wanders the streets and enters a public library, hoping to learn of a painless method for suicide. The old scholar whom Alex had assaulted in Part 1 finds him and beats him with the help of several friends. Two policemen come to Alex's rescue, but they turn out to be Dim and Billyboy, a former rival gang leader. They take Alex outside town, brutalise him, and abandon him there. Alex collapses at the door of an isolated cottage, realising too late that it is the one he and his droogs invaded in Part 1.

The writer, F. Alexander, still lives here, but his wife has since died of what he believes to be injuries she sustained in the rape. He does not recognise Alex but gives him shelter and questions him about the conditioning he has undergone. Alexander and his colleagues, all highly critical of the government, plan to use Alex as a symbol of state brutality and thus prevent the incumbent government from being re-elected. After Alex inadvertently reveals that he was the ringleader of the home invasion, he is removed from the cottage and locked in an upper-storey bedroom as a relentless barrage of classical music plays over speakers. He attempts suicide by leaping from the window.

Alex wakes up in a hospital, where he is courted by government officials, anxious to counter the bad publicity created by his suicide attempt. He is informed that F. Alexander has been "put away" for Alex's protection and his own. Alex is offered a well-paying job if he agrees to side with the government once discharged. A round of tests reveals that his old violent impulses have returned, indicating that the hospital doctors have undone the effects of his conditioning. As photographers snap pictures, Alex daydreams of orgiastic violence and reflects, "I was cured all right."

In the final chapter, Alex—now 18 years old and working for the nation's musical recording archives—finds himself halfheartedly preparing for another night of crime with a new gang (Len, Rick, and Bully). After a chance encounter with Pete, who has reformed and married, Alex finds himself taking less and less pleasure in acts of senseless violence. He begins contemplating giving up crime himself to become a productive member of society and start a family of his own while reflecting on the notion that his children could end up being just as destructive as he has been, if not more so.

Omission of the final chapter in the US The book has three parts, each with seven chapters. Burgess has stated that the total of 21 chapters was an intentional nod to the age of 21 being recognised as a milestone in human maturation. The 21st chapter was omitted from the editions published in the United States prior to 1986. In the introduction to the updated American text (these newer editions include the missing 21st chapter), Burgess explains that when he first brought the book to an American publisher, he was told that US audiences would never go for the final chapter, in which Alex sees the error of his ways, decides he has lost his taste for violence and resolves to turn his life around.

At the American publisher's insistence, Burgess allowed its editors to cut the redeeming final chapter from the US version, so that the tale would end on a darker note, with Alex becoming his old, ultraviolent self again – an ending which the publisher insisted would be "more realistic" and appealing to a US audience. The film adaptation, directed by Stanley Kubrick, is based on the American edition of the book, which Burgess initially liked, but later preferred the British conclusion. Kubrick called Chapter 21 "an extra chapter" and claimed that he had not read the original version until he had virtually finished the screenplay and that he had never given serious consideration to using it. In Kubrick's opinion – as in the opinion of other readers, including the original American editor – the final chapter was unconvincing and inconsistent with the book. Kubrick's stance was unusual when compared to the standard Hollywood practice of producing films with the familiar tropes of resolving moral messages and good triumphing over evil before the film's end.

Characters Alex: The novel's protagonist and leader among his droogs. He often refers to himself as "Your Humble Narrator". Having coaxed two ten-year-old girls into his bedroom, Alex refers to himself as "Alexander the Large" while raping them; this was later the basis for Alex's claimed surname DeLarge in the 1971 film. George, Georgie or Georgie Boy: Effectively Alex's greedy second-in-command. Georgie attempts to undermine Alex's status as leader of the gang and take over their gang as the new leader. He is later killed during a botched robbery while Alex is in prison. Pete: The only one who does not take particular sides when the droogs fight among themselves. He later meets and marries a girl named Georgina, renouncing his violent ways and even losing his former (Nadsat) speech patterns. A chance encounter with Pete in the final chapter influences Alex to realise that he has grown bored with violence and recognise that human energy is better expended on creation than destruction.A Clockwork Orange Resucked . The Floating Library. Retrieved on 2013-10-31. Dim: An idiotic and thoroughly gormless member of the gang, persistently condescended to by Alex, but respected to some extent by his droogs for his formidable fighting abilities, his weapon of choice being a length of bike chain. He later becomes a police officer, exacting his revenge on Alex for the abuse he once suffered under his command. P. R. Deltoid: A criminal rehabilitation social worker assigned the task of keeping Alex on the straight and narrow. He seemingly has no clue about dealing with young people, and is devoid of empathy or understanding for his troublesome charge. Indeed, when Alex is arrested for murdering an old woman and then ferociously beaten by several police officers, Deltoid simply spits on him repeatedly. Prison Chaplain: The character who first questions whether it is moral to turn a violent person into a behavioural automaton who can make no choice in such matters. This is the only character who is truly concerned about Alex's welfare; he is not taken seriously by Alex, though. He is nicknamed by Alex "prison charlie" or "chaplin", a pun on Charlie Chaplin.