"Dear Greenpeace" is a children's book written by Simon James. It tells the story of a young girl named Emily who writes a letter to the environmental organization Greenpeace about a whale she believes is living in her garden pond. In her letters, Emily describes her imaginative adventures and her concern for the whale's well-being. The book highlights themes of environmental awareness and the importance of caring for nature, making it an engaging read for children and a valuable resource for discussions about wildlife conservation.