At the crossroads of representation theory, algebraic geometry and finite group theory, this 2004 book blends together many of the main concerns of modern algebra, with full proofs of some of the most remarkable achievements in the area. Cabanes and Enguehard follow three main themes: first, applications of ?tale cohomology, leading to the proof of the recent Bonnaf?-Rouquier theorems. The second is a straightforward and simplified account of the...