This three-chapter volume concerns the distributions of certain functionals of L?vy processes. The first chapter, by Makoto Maejima, surveys representations of the main sub-classes of infinitesimal distributions in terms of mappings of certain L?vy processes via stochastic integration. The second chapter, by Lars N rvang Andersen, S ren Asmussen, Peter W. Glynn and Mats Pihlsg?rd, concerns L?vy processes reflected at two barriers, where reflection...