When you think of your favourite story what pictures spring to mind?
Lots of amazing children's books are known not just for the story but also for the pictures.
At the British Library in London, an exhibition is showcasing iconic illustrations from classics such as Paddington Bear and Charlie and the Chocolate Factory.
Ricky's been to check out the collection and find out why the pictures are so popular.
Send us your drawings
If you're feeling inspired, we want you to send us your drawings of your favourite illustrated character.
Email your drawing to email@example.com and we'll try to put some of them in a picture gallery here on the Newsround website.
So grab your pen and pencil and get drawing!