You might consider starting with 'Mort'. It's an accessible entry point into Pratchett's body of work. In this novel, you'll encounter his signature blend of humor, unique characters, and a world that has its own set of rules that are part science - fictional and part fantastical. It also delves into some interesting themes about life, death, and the afterlife in a way that is both engaging and thought - provoking.
A good one to start with could be 'The Sea and Little Fishes'. It gives a taste of Pratchett's Discworld and his style of writing, with its engaging characters and interesting plot twists.
A great one to start with is 'Mort' itself. It's an entry point into the Discworld series and introduces many of the key concepts and characters in an accessible way. You get to meet Death as a character, which is a really interesting aspect of Pratchett's world - building. Mort, the main character, is easy to relate to as he's just an ordinary lad trying to find his place in this strange world.
I think 'Going Postal' can also be good for beginners. It has a clear and engaging plot about a con - man who has to turn around the Ankh - Morpork post office. It's full of Pratchett's clever wordplay and unique characters, and it gives a great sense of the Discworld setting.
However, 'Good Omens', which Pratchett co - wrote with Neil Gaiman, is also a very popular work. It combines Pratchett's signature humor with Gaiman's unique style. The story of the angel Aziraphale and the demon Crowley trying to prevent the apocalypse is full of hilarious moments, interesting characters, and a really engaging plot that has attracted a large fan base.
The ranking of Terry Pratchett's novels is a matter of opinion. For instance, 'Wyrd Sisters' and 'Small Gods' are often favored by many. It often comes down to which aspects of his writing resonate most with each reader.
Some of the best Terry Pratchett novels include 'Guards! Guards!'. It has a great plot with the Night Watch in Ankh - Morpork facing a dragon. Another excellent one is 'Mort'. It delves into the concept of Death and his apprentice Mort. 'Small Gods' is also a top pick as it satirizes organized religion in a very Pratchett - esque way.
The last Terry Pratchett novel was 'The Shepherd's Crown'. It was published posthumously in 2015. It is part of his Discworld series and is a great testament to his unique and imaginative writing style that fans around the world had come to love over the years.
For many, 'Guards! Guards!' is one of the best. It introduces the Ankh - Morpork City Watch in a very engaging way. The characters like Sam Vimes are well - developed and the story is full of Pratchett's unique humor, satire, and his brilliant world - building.