Hey there! So let me explain to you what a prize book is in a way that even a 5 year old can understand.
You know how sometimes you might do really well in school or win a competition? Sometimes when that happens, you might get a special prize to reward you for your hard work.
Well, a prize book is kind of like that - but for grown-ups! Sometimes when people write really good books, they might win a prize too. And one of the prizes they can win is a special book that has been chosen as a way to honor and celebrate their hard work.
These prize books are usually filled with really interesting stories, pictures, and information. They might be about all sorts of different things, like animals, history, or science. And when someone wins a prize book, it means that they have done something really special and cool that other people want to celebrate and recognize.
So, in short, a prize book is a special book that someone gets as a reward for doing something really amazing. And who knows - maybe one day you'll write a book that's so fantastic that you'll win one too!