"Professor Janet Mann is an expert in the social networks of cetacean societies. Her new book, explores just that: self-recognition, complex songs, intricate social networks, and cetaceans' ability to relate to humans. She also takes a deep dive into the environmental impact we are having on them." - The Guardian "In keeping technical language to a minimum and matching the clearly written text to beautiful illustrations and clear and concise diagrams, Mann and her collaborators have produced an evocative summary of what it is to be whale." - New Scientist ""A fascinating book highlighting some of the most extraordinary features of whales, dolphins and porpoises, it's ideal for those interested in wildlife behaviour." - Outdoor Photography *Book of the Month* "Through their complex songs and intricate underwater societies, we assume whales, dolphins and porpoises are the smartest creatures in the sea. But how do we know? Through the findings of researchers in mammalian intelligence who observe cetacean brains and study mammals in the field and in captivity, this book dives deep to find the answers." - Coast Magazine *Book of the Month* "For anyone who has ever felt mildly nauseous when reading books by authors who find dolphin smiles and whale song endlessly spiritual, uplifting experiences, this more dispassionate offering might come as a tonic." - Diver Magazine "Deep Thinkers makes for a great introduction to the topic of cetacean intelligence, and would be the perfect gift to your non-biologist friend or relative who wants to know more." - Natural History Book Services Whales, dolphins, and porpoises are the smartest creatures in the sea. We know of their self-recognition, complex songs, their intricate societies and their ability to relate to humans. But how do we know just how intelligent these creatures are? And what is the extent of our knowledge? This insightful scientific study brings together the top researchers in this field to explain their findings in a straightforward and accessible way that requires no prior knowledge. Examining cetacean brains and comparing intelligence markers with birds, bats, primates, this study showcases the extraordinary behaviors of marine mammals and explains what they reveal about intelligence. Featuring beautiful photographs, clear explanatory graphics, and lively, engaging text, Deep Thinkers is a truly comprehensive exploration that will set the benchmark for future titles on this topic.