The field of hyperbolic 3-manifolds and Kleinian groups is at present very active. This book contains the proceedings of a workshop held in Warwick in 2001, which was devoted to this topic. This first part of the book contains 8 papers on hyperbolic three-dimensional manifolds. The contribution by Y. N. Minsky is a revised form of a series of six lectures at the workshop devoted to a generalization of the Thurston ending lamination conjecture to general surfaces. The second part includes a paper by T. Jørgensen on pairs of once-punctured tori together with four other related papers. The book ends with three review papers on related topics (including the paper by D.B.A Epstein, A. Marden and V. Markovic containing counterexamples to the equivariant K=2 conjecture for hyperbolic convex hulls).