Cetacean intelligence remains a topic of intense interest, and has been the subject of several excellent books in recent years, such as Are Dolphins Really Smart? The Mammal Behind the Myth, The Cultural Lives of Whales and Dolphins, and Dolphin Communication and Cognition: Past, Present, and Future. Ivy Press typically produces entry-level pop-science books, which is by no means intended as a disparaging qualification. I have read several of above-mentioned books, and even for a biologist coming from a different discipline, these are technical works. Ivy Press’s Deep Thinkers stands out by being both accessibly written and richly illustrated, making it a perfect entry to this topic.