Ellie Simmonds chats about her book
10 June 2014 Last updated at 08:40 BST
Four-time Paralympic champion Ellie Simmonds has written a collection of books for children.
The main character is based on Ellie herself and has achondroplasia, the most common form of dwarfism.
Ellie popped into the Newsround studio to chat to Jenny about her book.