Okay kiddo, have you ever played with different toys and combined them together to make something new? That's kinda like what a mashup novel is!
Imagine you have two stories: one about a wizard and one about a robot. When you put them together, you get a mashup novel that's about a wizard who can control robots! It's like having two stories in one big book!
Sometimes authors take parts from different stories and put them together to make a new story. For example, maybe they use the characters from one story but put them in a different setting from another story.
It's like mixing and matching different ingredients to make a yummy new recipe. The author is like the chef who has to figure out which parts will work well together and how to make them fit.
So, a mashup novel is when you take parts from different stories and combine them to make a new, exciting story!