The Jungle Book by Rudyard Kipling is a collection of stories that are all entirely fictional. We can be absolutely certain of this given that most of the stories concern anthropomorphic animals that communicate in the English language not only with each other, but with humans as well. The Jungle Book has been an invaluable work of fiction for over a century, particularly for children, and has been adapted into several versions of film and other media.
Though The Jungle Book is largely concerned with animals as its primary characters, the stories and morals are less about the natural world and far more concerned with representing human archetypes with the animals themselves. To this end, the book teaches lessons about morality and society in an entertaining and easily digestible way, as it is speculated that Kipling first wrote the stories for his daughter.