Well, 'Night Watch' is a very significant Discworld novel. It takes the reader back in time in the city of Ankh - Morpork and shows how the city's Watch, the police force, came to be what it is in the present - day novels. Also, 'Reaper Man' is important as it deals with Death's sabbatical from his duties and the chaos that ensues. These novels are important as they expand on the lore and the complex web of relationships in the Discworld.
I think 'Mort' is also very popular. It has a unique story about Death taking on an apprentice, and the graphic novel version makes it even more accessible and engaging. The art style is really appealing to many fans of the series.
The last Discworld novel is 'The Shepherd's Crown'. It was published posthumously as Sir Terry Pratchett passed away in 2015. This novel continues the rich tapestry of the Discworld series, with all its unique characters, satirical humor, and imaginative world - building.
Definitely 'Wyrd Sisters'. It's a brilliant take on Shakespearean themes within the Discworld universe. The three witches are such memorable characters. The way Pratchett weaves the story, with all its political intrigue and magic, makes it one of the top Discworld novels. There are also many other great ones, but these are some of the most highly regarded.
I would recommend 'Guards! Guards!'. It's a great starting point as it introduces the city of Ankh - Morpork and the Night Watch in a really engaging way. There's a lot of humor, a good mystery with the dragon plot, and it gives you a feel for Pratchett's unique writing style.
'Equal Rites' can be a good starting point as well. It deals with the idea of female magic in the Discworld, which is a unique concept. The story follows Eskarina Smith, a young girl with magical potential. It has Pratchett's trademark humor and a story that will draw you in. It also gives you an introduction to the magic system in the Discworld, which is quite fascinating.
I would recommend 'Guards! Guards!'. It has a great story with the Night Watch in Ankh - Morpork. The characters are really engaging, especially Sam Vimes. It's a good introduction to the world - building of Discworld, with its unique city full of all kinds of strange creatures and characters.
One of the top Discworld novels is 'Going Postal'. Moist von Lipwig is a very interesting character. He's a con - man who is given the task of resurrecting the Ankh - Morpork postal service. The story is full of Pratchett's typical humor, clever wordplay, and interesting world - building. 'Equal Rites' is also a great one. It focuses on the first female wizard in the Discworld, Esk, and her journey in a male - dominated magical world, dealing with issues of gender and magic.