Chronological Order of Publication
1. The Colour of Magic (1983)
2. The Light Fantastic (1986)
3. Mort (1987)
4. Sourcery (1988)
5. Guards! Guards! (1989)
6. Eric (1990)
7. Moving Pictures (1990)
8. Reaper Man (1991)
9. Witches Abroad (1991)
10. Small Gods (1992)
11. Lords and Ladies (1992)
12. Men at Arms (1993)
13. Soul Music (1994)
14. Interesting Times (1994)
15. Maskerade (1995)
16. Feet of Clay (1996)
17. Hogfather (1996)
18. Jingo (1997)
19. The Last Continent (1998)
20. Carpe Jugulum (1998)
21. The Fifth Elephant (1999)
22. The Truth (2000)
23. The Wee Free Men (2003)
24. Night Watch (2002)
25. Thief of Time (2001)
26. The Amazing Maurice and his Educated Rodents (2001)
27. The Gods The Gods (2001)
28. Monstrous Regiment (2003)
29. Going Postal (2004)
30. Thud! (2005)
31. Wintersmith (2006)
32. Making Money (2007)
33. The Colour of Magic (2008)
34. The Wee Free Men (2008)
35. A Hat Full of Sky (2004)
36. I Shall Wear Midnight (2010)
37. Snuff (2011)
38. Raising Steam (2013)
39. The Shepherd's Crown (2015)
Recommended Reading Order
* Rincewind (The "main" character of the first two books)
1. The Colour of Magic
2. The Light Fantastic
* Death
3. Mort
* The City Watch
4. Guards! Guards!
5. Men at Arms
6. Feet of Clay
7. Jingo
8. Night Watch
9. Thud!
* Witches
10. Witches Abroad
11. Lords and Ladies
12. Maskerade
13. Carpe Jugulum
14. I Shall Wear Midnight
* The Gods
15. Small Gods
* Other
16. Sourcery
17. Reaper Man
18. Moving Pictures
19. Soul Music
20. Interesting Times
21. The Last Continent
22. The Fifth Elephant
23. The Truth
24. The Wee Free Men
25. A Hat Full of Sky
26. The Amazing Maurice and his Educated Rodents
27. The Gods The Gods
28. Monstrous Regiment
29. Going Postal
30. Wintersmith
31. Making Money
32. Raising Steam
33. The Shepherd's Crown
Notes:
* This is just a general guide. You can read the books in any order you like.
* Many of the books can be read independently, but there are some recurring characters and themes throughout the series.
* The Discworld is divided into numerous sub-series (Witches, City Watch, Rincewind, Death, etc.). Reading within a particular sub-series will give you a more in-depth experience.
* If you're new to the Discworld, "The Colour of Magic" and "The Light Fantastic" are a good place to start. They introduce the world and the main characters.
* The Discworld is a vast and complex world, so there are plenty of books to keep you entertained.
Enjoy exploring the Discworld!