'The Beasts of Tarzan' is the third novel in the Tarzan series by Edgar Rice Burroughs. In this book, Tarzan, also known as John Clayton, is stranded on a jungle island by his enemies who kidnap his wife, Jane, and infant son. With the help of wild beasts and native tribes, he navigates through the wilderness and sea to find and rescue his family. This story unfolds with exciting adventures, highlighting Tarzan's physical strength mixed with his fierce love and determination.