Award Winning author David Quammen delivers a brilliant, informative presentation of different animals, explaining clearly in simple terms how a disease spills over from animal to human. Through compelling stories weaved together, the author gives a gripping account of new infectious diseases, different animals in relation to specific diseases, and fascinating science reporting of examinations conducted by scientists. In addition, information reported from extensive research is provided on apes, horses, bats and other animals. The author presents engaging stories as he writes with compassion and sympathy about different diseases and the dangers of spillover. Discussions about outbreaks of infectious diseases are provided, along with information on dealing with ongoing threats. It was extremely interesting to learn about the results of examinations, and progress made by the professionals as they face several challenges. It was also scary to ponder on the growing trend of diseases that spill from animal to human, a major concern is noted while contemplating on why these diseases emerge. Of course, the reader becomes curious about a new outbreak, which makes this intelligent presentation thought-provoking throughout. Interesting, Educational, and Highly Recommended to science lovers!