  In this book, we review various aspects of the Lorentz symmetry breaking,
both classical and quantum ones, with the special interest to perturbative
generation of Lorentz-breaking terms. We present impacts of Lorentz symmetry
breaking in noncommutative and supersymmetric theories. Also, we discuss the
problem of Lorentz symmetry breaking in a curved space-time. The book is closed
with a review of experimental studies of Lorentz symmetry breaking.
