That's interesting. According to the Discworld Reading Order Guide 3.0 (available online), both books are part of the Industrial Revolution Novels, 7 books starting with Moving Pictures. If you loved those two then perhaps you should seek out the other books in that series. The series comprises Moving Pictures, The Truth, Monstrous Regiment, Going Postal, Making Money, Raising Steam, and Mrs Bradshaw's Handbook. The standalone I'm dying to read is Good Omens, with Neil Gaiman.
Discworld includes over 40 books, a daunting prospect for anyone who is new to the world. Fortunately, it appears it is possible to take it in bite-sized chunks, each chunk being a set of books with a common theme. I want to start with the Watch Novels, 9 books about a group of guardsmen in the city watch. Supposed to be hilarious. If I'm able to complete that then I'll tackle, in order, the Death Novels (8 books), the Witches Novels (7 books), and then the Industrial Revolution Novels, the Rincewind Novels (10 books), ..., etc. I don't know if I can do all that, but we'll see.