The light fantastic
The second Novel, this follows on the story of the first and these are really the only two books that do this.
Equal rites
The story of a little Girl who goes to the Wizards University to learn to be a Wizard, but Wizards are only men! A Good story taking a crack at sexism (amongst other things).
Mort
How Death got his apprentice, this was my firm favourite for a long time, and I still re-read it more than any of the other ones. If you only have one T.Pratchett book make it this one.
Sourcery
A Sourcer comes to Ankh Morpork! Will it upset the fabric of the universe or will the Wizards and a certain Urang-U-Tan be able to avert the danger in time for the next meal?
Wyrd sisters
This starts out a little like a shakespeare plot, and carries on that way, with Terry's humour making it an irrisistable read.
Pyramids
The gods walk the earth, the dead walk the earth, the pyramids secrets are unveiled.
Guards guards
A 6 foot dwarf joins the Ankh Morpork Night Watch, and stirs things up a little.
Eric
An underage demonologie hacker who gets more than he's bargined for - exactly what he's asked for!
Moving pictures
Psst! wanna get into moving pictures? Course ya do!
Reaper Man
What would happen if the Reaper man took a holiday? Ever heard of a Zombie?
Witches abroad
Our three friends the witches go abroad to a place that sounds a bit like Spain, and another that sounds amazingly like Africa!
Small Gods
Lords & Ladies
Men at arms
Soul Music
Interesting Times
Maskerade
Feet of Clay
Hogfather
Jingo
The Last Continent - Not out yet
The Discworld Companion
The Streets of Ankh Morpork - A Map of Ankh Morpork
The Guild of Fans and Disciples
The Unofficial T.Pratchet fan club
Discworld Homepage
'In your heart you know it's true' - Terry Pratchett
The L-Space Web
It's worth a visit