This book attempts to refute Chomskyan linguistics and its popularization by Steven Pinker. It purports to refute "myths" of language propagated by the Chomskyans; however, I was not at all convinced.
Birds are one of the three taxons of vertebrates capable of flight (the others being bats and extinct pterosaurs). The closest living relatives of birds are the crocodilians. There is this Russian joke: crocodiles can fly, but very, very low. It is likely that Jurassic bird-like dinosaurs had something similar to flight, but not quite the same, like "flying" squirrels and colugos do now, but they are extinct; birds are the only living archosaurs (a taxon consisting of dinosaurs and related reptiles) capable of anything resembling flight. Likewise, humans are the only living animals possessing anything resembling language. Neandertals, Denisovans and other extinct hominids may have possessed something similar to language, but not quite the same, but they are extinct. Evans tries to dredge up examples of animal behavior similar to human language in some respects, but to me this resembles trying to prove that crocodiles can fly. Evans's bringing up examples of apes being taught sign language looks pathetic to me. There are many works of fiction about human children brought up by animals or aliens and learning animal or alien ways, but even in fiction these ways are foreign to human nature. Mowgli did not become a wolf, and did not bring up his children as wolves, nor did Romulus and Remus. Likewise, even if primatologists teach a bonobo or a gorilla some signs (not a real human sign language like ASL, which they are incapable of learning), this is an unnatural thing for apes; there is no ape community actively using sign language and transmitting it to the next generation, and there cannot be.
Chomsky and Pinker say that language is an instinct. Evans disagrees: an instinct is a behavior that appears without learning, and language has to be learned. I think sexuality is a great analogy for language. When I was 13 years old, I looked through a booklet in Hungarian, a language I knew not a word of, which had a picture of sexual intercourse; I popped a woody. Puberty is when people start acquiring what adults think of as sexuality. You need to grow up in a society for it to develop properly, but it is a natural human behavior. Likewise, age 1-2 is when people start acquiring what adults think of as language. That you also need to grow up in a society to get it doesn't make it less of a natural human behavior, which is to say an instinct.
Evans also critiques the concept of Mentalese, or a mind-representation of concepts separate from linguistic representation. To me, the most obvious sign of the existence of Mentalese is irony. When a Donald Trump impersonator says, "Remember American carnage? It's unbelievable. It's even gotten better. How are you guys loving the American carnage now?" it does not mean what it literally means. How does the audience understand it? It doesn't think it words.
(in reality, linguists Asya Pereltsvayg and Norbert Hornstein wrote many blog postings criticizing Evans's book point by point; I am just writing about what struck me as wrong as I was reading it.)