The Discworld novels are for people who appreciate clever and humorous storytelling. They're suitable for anyone from teenagers to adults who are interested in fantasy literature that offers both entertainment and thought-provoking ideas.
I think the readers for 'a2 short stories' are those who are at the a2 level in English proficiency. This could include students in language courses who are just starting to build their language skills. Also, it might be for self - learners who want to improve their basic English reading ability. They would benefit from the relatively simple language and short length of these stories.
Middle grade fiction is mainly written for children in the 8-12 age range. It's designed to capture their interests and reading abilities at that stage of development.
The 'just so stories' are mainly aimed at children. The language is simple and the plots are engaging, which is perfect for young minds. These stories can help children learn about different animals and their features in a fun and interesting way. But it's not just for kids. Adults who like fables or stories with a touch of whimsy can also find enjoyment in them. They can be a great way to relax and enter a world of creative explanations about the natural world.