This seems like a seriously good book and covers communications from pre verbal and sign language through to language and symbols then writing and through to printing and electronic media. Though, because it was published in 1981, it was well before the internet took off. So somewhat dated now. Nevertheless I'm really sorry that i've never read it in detail. And I'm now in the position of having to downsize my library and this book is one of the casualties. Pity but I won't be using it in the future. I give it four stars. ( )