This book is written for theoretical and mathematical physicists and
mat- maticians interested in recent developments in complex general
relativity and their application to classical and quantum gravity.
Calculations are presented by paying attention to those details normally
omitted in research papers, for pedagogical r- sons. Familiarity with
fibre-bundle theory is certainly helpful, but in many cases I only rely
on two-spinor calculus and conformally invariant concepts in
gravitational physics. The key concepts the book is devoted to are
complex manifolds, spinor techniques, conformal gravity, ?-planes,
?-surfaces, Penrose transform, complex 3 1 - - space-time models with
non-vanishing torsion, spin- fields and spin- potentials. 2 2 Problems
have been inserted at the end, to help the reader to check his und-
standing of these topics. Thus, I can find at least four reasons for
writing yet another book on spinor and twistor methods in general
relativity: (i) to write a textbook useful to - ginning graduate
students and research workers, where two-component spinor c- culus is
the unifying mathematical language.