Christiane Engel illustrated Cities Going Wild - To Save the Planet by Catherine Barr, published by Otter-Barry Books in March 2026. Part of the same series as Wildlife Crossings - Protecting Animal Pathways Around the World and Water - Protect Freshwater to Save Our Earth, this inspiring book explores how cities worldwide are becoming greener, healthier places for people and wildlife alike. Brought to life by Christiane’s vibrant illustrations, it invites young readers to discover urban nature and try fun activities to help make their own city more wildlife-friendly.