The Little Book of the Big Bang: A Cosmic Primer (Little Book Series)
From the reviews:"The explosion of data and theory in cosmology has led to a profusion of books about modern cosmology written for non-experts. Craig Hogan's cosmic primer ranks among the best: it is a gem."NATURE"… A book for those who already know something about the subject and want to be reminded of how all the jigsaw pieces fit together. And it is a priceless window into the mind of one of the major players in present-day cosmology."New Scientist