Chaos Walking

1. 

   Book 2

   The Ask and the Answer Ss

   Patrick Ness

2. 

   Book 3

   Monsters of men

   Patrick Ness

3. 

   The Knife of Never Letting Go

   Patrick Ness, Nick Podehl

4. The Ask and the AnswerPatrick NessNess

   A

   The Ask and the Answer

   Patrick Ness

Book data and covers from Open Library (openlibrary.org).