The goal of this book is to introduce the reader to some of the main
techniques, ideas and concepts frequently used in modern geometry. It
starts from scratch and it covers basic topics such as differential and
integral calculus on manifolds, connections on vector bundles and their
curvatures, basic Riemannian geometry, calculus of variations, DeRham
cohomology, integral geometry (tube and Crofton formulas),
characteristic classes, elliptic equations on manifolds and Dirac
operators. The new edition contains a new chapter on spectral geometry
presenting recent results which appear here for the first time in
printed form.