From the reviews: "In the last decade and a half, many scientists have come to believe that special relativity, as Einstein formulated it, will need to be modified to accommodate a quantum theory of gravity. ... the volume presents an excellent survey of current research on Lorentz symmetry. Most of the book should be accessible to graduate students and researchers who are interested in the field ... . provide abundant references, which should be quite valuable in a field with as many counterintuitive features as Lorentz violation research." (Brett D Altschul, Classical and Quantum Gravity, Vol. 24, 2007)