Have you read any of them? Depending on how you count them, and what you include in the count, there are over 40 books in the series, with some people saying there are 47 -- "There are 47 books in the series, several short stories, and supplemental books like The Science of Discworld, Where's My Cow, and The World of Poo." - google search
No matter how you look at it, there are a lot of books to read and enjoy!
Welcome to February in the Book Club and Discworld!

Graphic depicts what appears to be a huge turtle flying in space. On its back are four very large elephants (you can see three of them in the picture) -- who are supporting what appears to be a flat disc.
The different parts of this activity may be found here --
Book Teasers - Discworld Mix & Match
Book Teasers - Discworld Discussions
Book Teasers - Discworld Research
If you have any questions, please write them below or send me a HOL forum PM.
If you find yourself further inspired by the Discworld books, please free to share your enthusiams in fan fiction, poetry, stories or fan art.
Enjoy!