He wrote a vast array of books, including:
Discworld Series:
* The Colour of Magic (1983) - The first book in the series, introducing the wizard Rincewind.
* The Light Fantastic (1986)
* Equal Rites (1987)
* Mort (1987)
* Sourcery (1988)
* Wyrd Sisters (1988)
* Guards! Guards! (1989) - Introduces the City Watch.
* Eric (1990)
* Moving Pictures (1990)
* Reaper Man (1991)
* Witches Abroad (1991)
* Small Gods (1992)
* Lords and Ladies (1992)
* Men at Arms (1993)
* Feet of Clay (1996)
* Hogfather (1996)
* Jingo (1997)
* The Last Continent (1998)
* The Carpe Jugulum (1998)
* The Fifth Elephant (1999)
* The Truth (2001)
* Night Watch (2002)
* Thief of Time (2001)
* The Wee Free Men (2003) - First book in the "Wee Free Men" series.
* Monstrous Regiment (2003)
* A Hat Full of Sky (2004)
* Going Postal (2004)
* Thud! (2005)
* Wintersmith (2006)
* Making Money (2007)
* The Amazing Maurice and His Educated Rodents (2001) - Children's novel.
* I Shall Wear Midnight (2010)
* Snuff (2011)
* Raising Steam (2013)
* The Shepherd's Crown (2015) - Posthumously published.
Other Works:
* The Bromeliad Trilogy (1989-1993) - A science fiction series.
* Strata (1981)
* The Dark Side of the Sun (1976)
* The Carpet People (1971) - Children's novel.
This is not an exhaustive list, but it includes some of Terry Pratchett's most popular and celebrated works. His writing is characterized by wit, satire, and insightful commentary on human nature and society, all delivered with a healthy dose of humor.