Important additions to this new edition include:
* A completely new coordinate free formula that is easily remembered, and is, in fact, the Koszul formula in disguise;
* An increased number of coordinate calculations of connection and curvature;
* General fomulas for curvature on Lie Groups and submersions;
* Variational calculus has been integrated into the text, which allows for an early treatment of the Sphere theorem using a forgottten proof by Berger;
* Several recent results about manifolds with positive curvature.
From reviews of the first edition:
"The book can be highly recommended to all mathematicians who want to get a more profound idea about the most interesting
achievements in Riemannian geometry. It is one of the few comprehensive sources of this type."
- Bernd Wegner, Zentralblatt