This book provides a valuable glimpse into discrete curvature, a rich new field of research which blends discrete mathematics, differential geometry, probability and computer graphics. It includes a vertiginous collection of ideas and tools which will offer something new to all interested readers. Discrete curvature arose as much as a theoretical development as in response to unforeseen challenges coming from applications. Discrete and continuous geometries have turned out to be intimately connected - the bridges between the two are manifold and involve numerous fields: metric spaces,...