Content: Introduction and history / Robert H. Crabtree — Iridium-catalyzed hydrogenation using phosphorus ligands / Montserrat Die?guez, Oscar Pa?mies, and Carmen Claver — Iridium-catalyzed asymmetric hydrogenation of olefins with chiral N, P and C, N ligands / David Woodmansee and Andreas Pfaltz — Iridium-catalyzed hydrogen transfer reactions / Ourida Saidi and Jonathan M.J. Williams — Formation of C-C bonds via iridium-catalyzed hydrogenation and transfer hydrogenation / John F. Bower and Michael J. Krische — Ir-catalyzed functionalization of C-H bonds / Jongwook Choi and Alan S. Goldman — Iridium-catalyzed allylic substitution / John F. Hartwig and Mark J. Pouy — Iridium-catalyzed 1,3-dipolar cycloadditions / Daniel Carmona and Luis A. Oro