Matilda is indeed a realistic fiction book. It has elements of real-life challenges and emotions that many children can identify with, while also adding a touch of imagination and magic to make it more engaging.
It's about a very special girl named Matilda. She is extremely intelligent and has a love for books. But she has to face a difficult family situation and a mean headmistress at school. However, with her intelligence and some magical elements in the story, she overcomes various challenges.