(Paperback)

"In the childhood of every human being and at the dawn of human history there is an amazing and, until now, unexplained leap from simple genetically programmed behavior to language, symbolic thinking,"

(Paperback)

"What do you get when you cross an esteemed child psychiatrist with a noted pediatrician, both at the apex of their abilities A darned important book, that's what." --Library Journal (starred review)