This book is a great read if you are interested in the prenatal development of infant's linguistic capabilities. Although that sentence may sound as though it drips with sarcasm, it does not. The book lends itself more to the academic fields of Psychology and Cognitive Development, but also is packed with information that may concern parents, or parents to be.
I recommend this book especially for men during the process of maternal pregnancy. It offers a solid knowledge of what is happening beyond the emotions and feelings of development and provides a good course of action on why the external environment is so important and not merely how.