In White level books there is a more sophisticated use of narrative voice. Clauses in longer sentences are separated by commas to encourage developing intonation. Some books have longer chapters for more sustained reading. The stories included at White level encourage children to empathise with the characters and consider why they behave as they do, and how they change during the course of the story. The non-fiction books are divided into sections that require more sustained reading and there is increased challenge in the layout of the information.