
20,000 Streets Under the Sky is a trilogy of semi-autobiographical novels by Patrick Hamilton.

2023: A Trilogy is a book by Jimmy Cauty and Bill Drummond writing as The Justified Ancients of Mu Mu. The book was published in 2017, 23 years after the duo had burnt one million British pounds they earned in the music industry as The KLF.

The Batman & Dracula trilogy consists of three American graphic novels—Batman & Dracula: Red Rain (1991), Bloodstorm (1994), and Crimson Mist (1998)—written by Doug Moench and penciled by Kelley Jones. The books were published by DC Comics as a part of its Elseworlds line of comics. Moench created the concept for the first installment and convinced Jones, of whom he was a fan, to join the project. Red Rain's eventual popularity resulted in DC commissioning sequels.

The Bounty Trilogy is a book comprising three novels by Charles Nordhoff and James Norman Hall. It relates events prior to, during and subsequent to the Mutiny on the Bounty.

The Divergent trilogy is a series of young adult science fiction adventure novels by American novelist Veronica Roth set in a post-apocalyptic dystopian Chicago. The trilogy consists of Divergent (2011), Insurgent (2012) and Allegiant (2013). A related book, Four (2014), presents a series of short stories told from the perspective of one of the trilogy's characters, the male love interest Four. A later short story, We Can Be Mended (2018), serves as an epilogue five years after the events of the trilogy, again from Four's perspective.

The Dreamseller saga consists of three novels written by Augusto Cury – doctor, psychiatrist, psychotherapist and publishing phenomenon in Brazil. The first book to be released in the U.S. market — The Dreamseller: The Calling — features characters that are present in the whole saga. Through a narrative composed from the heart, Cury draws a parallel between the effects of modern society in our lives and our emotions.

Fifty Shades is a series of erotic novels by E. L. James, initially a trilogy consisting of Fifty Shades of Grey (2011), Fifty Shades Darker (2012) and Fifty Shades Freed (2012). The series traces the deepening relationship between college graduate, Anastasia Steele, and young business man, Christian Grey. Grey introduces Ana to the world of BDSM.

The Junction Chronicles is a trilogy of Canadian speculative thrillers by David Rotenberg, whose protagonist, acting coach Decker Roberts, a synaesthete with a special talent for determining the truth in statements, lives in the neighbourhood of The Junction in Toronto, supplementing his income with his unique talent and becoming involved with American intelligence agents after his life begins to fall apart. The series was first published by Simon & Schuster between 2012 and 2014.

Kristin Lavransdatter is a trilogy of historical novels written by Nobel laureate Sigrid Undset. The individual novels are Kransen, first published in 1920, Husfrue, published in 1921, and Korset, published in 1922. Kransen and Husfrue were translated from the original Norwegian as The Bridal Wreath and The Mistress of Husaby, respectively, in the first English translation by Charles Archer and J. S. Scott.

Trylogia Księżycowa is a trilogy of science fiction novels by the Polish writer Jerzy Żuławski, written between 1901 and 1911. It has been translated into Russian, Czech, German, English and Hungarian, and has been reprinted several times in Poland. They are his best-known works.

The Murder House Trilogy is a three-part detective fiction mini-series in The Hardy Boys Undercover Brothers, published by Aladdin Paperbacks. The first book in the trilogy, Deprivation House, was published on May 20, 2008, with books #2 House Arrest and #3 Murder House published on July and September respectively.

The New York Trilogy is a series of novels by American writer Paul Auster. Originally published sequentially as City of Glass (1985), Ghosts (1986) and The Locked Room (1986), it has since been collected into a single volume. The Trilogy is a postmodern interpretation of detective and mystery fiction, exploring various philosophical themes.

The Ordinalia are three medieval mystery plays dating to the late fourteenth century, written primarily in Middle Cornish, with stage directions in Latin. The three plays are Origo Mundi, Passio Christi and Resurrexio Domini. The metres of these plays are various arrangements of seven- and four-syllabled lines. Ordinalia means "prompt" or "service book".

The Oresteia is a trilogy of Greek tragedies written by Aeschylus in the 5th century BC, concerning the murder of Agamemnon by Clytemnestra, the murder of Clytemnestra by Orestes, the trial of Orestes, the end of the curse on the House of Atreus and the pacification of the Erinyes. The trilogy—consisting of Agamemnon (Ἀγαμέμνων), The Libation Bearers (Χοηφóρoι), and The Eumenides (Εὐμενίδες)—also shows how the Greek gods interacted with the characters and influenced their decisions pertaining to events and disputes. The only extant example of an ancient Greek theatre trilogy, the Oresteia won first prize at the Dionysia festival in 458 BC. The principal themes of the trilogy include the contrast between revenge and justice, as well as the transition from personal vendetta to organized litigation. Oresteia originally included a satyr play, Proteus (Πρωτεύς), following the tragic trilogy, but all except a single line of Proteus has been lost.

The Oversoul Seven Trilogy is a novel by author Jane Roberts. It consists of the three previously published books The Education of Oversoul Seven (1973), The Further Education of Oversoul Seven (1979), and Oversoul Seven and the Museum of Time (1984).
The Pan trilogy consists of three novels by the French writer Jean Giono, published in 1929–1930. The stand-alone stories are set in Provence and revolve the struggles of the peasant population. Two of the novels were made into films in the 1930s by Marcel Pagnol.

The Rosie Result is a 2019 novel by Australian novelist Graeme Simsion. The work was first published on 5 February 2019 by Text Publishing.
The Salterton Trilogy consists of the first three novels by Canadian novelist Robertson Davies: Tempest-Tost (1951), Leaven of Malice (1954), and A Mixture of Frailties (1958). The series was also published in one volume as The Salterton Trilogy in 1986.

Silicon Dreams is a trilogy of interactive fiction games developed by Level 9 Computing during the 1980s. The first game was Snowball, released during 1983, followed a year later by Return to Eden, and then by The Worm in Paradise during 1985. The next year they were vended together as the first, second and last of the Silicon Dreams. Early advertisements gave it the title of Silicon Dream, but it was pluralised later.

The Starchild Trilogy is a series of three science fiction novels written by Frederik Pohl and Jack Williamson. In the future depicted in this series, mankind is ruled by a brutal totalitarian government known as the Plan of Man, enforced by a computerized surveillance state.

The Sword of Honour is a trilogy of novels by Evelyn Waugh which loosely parallel Waugh's experiences during Second World War. Published by Chapman & Hall from 1952 to 1961, the novels were: Men at Arms (1952); Officers and Gentlemen (1955); and Unconditional Surrender (1961), marketed as The End of the Battle in the United States and Canada.

Tales of the Kingdom Trilogy includes three allegorical books: Tales of the Kingdom (1983), Tales of the Resistance (1986) and Tales of the Restoration (1996), by authors David and Karen Mains. The series has been the recipient of the Evangelical Christian Publishers Association (ECPA) Gold Medallion Award under the Children's Book Category.

The Tiny Book of Tiny Stories is a trilogy collection of poetic tiny, short stories, no more than a few lines long each. It is compiled by owner and founder of the online collaborative production company hitRECord, Joseph Gordon-Levitt and Wirrow, a curator at hitRECord. It is published by HarperCollins' imprint IT Books. The first book of the trilogy was published in 2011, the second and third volumes were released in late 2012 and in 2013. The slogan for the trilogy is: "The universe is not made of atoms; it’s made of tiny stories". It is suggested that the books are for 18+ year olds.

The Transylvanian Trilogy, also called A Transylvanian Tale or The Writing on the Wall, is a novel in three parts by the Hungarian writer Miklós Bánffy, published from 1934 to 1940. The trilogy tells about the moral decline of the Hungarian nobility and the loss of (Austria-)Hungary as a nation, in the ten years preceding the outbreak of the First World War. The novel tells the story of two cousins, the socially engaged count Bálint Abády and count László Gyerőffy. Their lives are set against the background of the political events in and outside Hungary. A part of the storyline takes place on the Transylvanian Plain, the area where Bánffy himself grew up.

The U.S.A. trilogy is a series of three novels by American writer John Dos Passos, comprising the novels The 42nd Parallel (1930), 1919 (1932) and The Big Money (1936). The books were first published together in a volume titled U.S.A. by Modern Library in 1937.

The Wimbledon Trilogy consists of three books written by Nigel Williams set in Wimbledon, London and published by Faber & Faber: