Where the World Ends is a 2017 young adult novel by Geraldine McCaughrean and illustrated by Jane Milloy. It won the 2018 Carnegie Medal.

Geraldine McCaughrean is a British children's novelist. She has written more than 170 books, including Peter Pan in Scarlet (2004), the official sequel to Peter Pan commissioned by Great Ormond Street Hospital, the holder of Peter Pan's copyright. Her work has been translated into 44 languages worldwide. She has received the Carnegie Medal twice and the Michael L. Printz Award among others.