Okay kiddo, have you ever read a book with pictures in it? Well, that's called illustrated fiction. It's when there are drawings or photos in the book to help tell the story.
Illustrated fiction can be all sorts of stories, like adventure stories or books about animals. The drawings can show what the characters look like, what the setting is like, or what's happening in the story.
Sometimes, the pictures are just on the cover of the book. Other times, they are throughout the book, like on every other page.
Now, let's say you're reading a story about a magical kingdom. The pictures might show you what the castle looks like, what the king and queen are wearing, or what the unicorn looks like. The pictures can help you understand the story better and make the book more fun to read.
So that's what illustrated fiction is, a fun way to tell a story with pictures that help you see and understand what's happening.