"A Walk on the Great Barrier Reef" is a children's non-fiction book written by Caroline Arnold that explores the world's largest coral reef system located off the coast of Australia. The book takes young readers on a journey through the Great Barrier Reef, highlighting the diversity of marine life that inhabits the coral ecosystem, including colorful fish, sea turtles, sharks, and dolphins. Through informative text and vivid illustrations, the book also educates readers about the importance of preserving the reef and the threats it faces from climate change and human activity. Along the way, readers will learn fascinating facts about the reef, including how it was formed, its role in the global ecosystem, and the efforts being made to protect it. "A Walk on the Great Barrier Reef" is an engaging and educational resource that inspires a sense of wonder and curiosity about the natural world.