From the reviews:
A thorough and readable representation of today's understanding of the topic ... An excellent overview of the various theoretical approaches to the physics that leads to decoherence. A particular strength is that it includes accounts of several experiments demonstrating the decoherence mechanism in detail ... An important resource for anyone interested in decoherence. It is very well written and it will contribute to further conceptual and theoretical development and to new experiments.
Review by Anton Zeilinger, published in Nature 451, 18 (2008)
An excellent monograph about what the best current thoughts are on the link between quantum and classical physics. ... rewarding reading for physicists who do not have the time or the mathematical preparation to delve into all the details. For such readers, the book includes interesting and accessible discussions of recent experiments ... . a welcome contribution. The index is well organized to help readers find their way around. And the more than 500 up-to-date references are a bonus for the more interested, persistent reader. (Eugen Merzbacher, Physics Today, September, 2008)
A very fine tour of the decoherence program in all its facets. ... Schlosshauer's book is highly recommended. ... [He] has written an excellent survey of a field that is of the greatest possible interest for the foundations of quantum physics. (N. P. Landsman, Studies in History and Philosophy of Modern Physics, Vol. 40, 2009)
