The first edition of this book presented simple proofs of the
Atiyah-Singer Index Theorem for Dirac operators on compact Riemannian
manifolds and its generalizations (due to the authors and J.-M. Bismut),
using an explicit geometric construction of the heat kernel of a
generalized Dirac operator; the new edition makes this popular book
available to students and researchers in an attractive softcover. The
first four chapters could be used as the text for a graduate course on
the applications of linear elliptic operators in differential geometry
and the only prerequisites are a familiarity with basic differential
geometry. The next four chapters discuss the equivariant index theorem,
and include a useful introduction to equivariant differential forms. The
last two chapters give a proof, in the spirit of the book, of Bismut's
Local Family Index Theorem for Dirac operators.