Preface. - 1. Cr Complexes of Nitrogen Donor Ligands for Olefin Oligomerisation and Polymerisation David S. McGuinness .- 2. Late-transition metal complexes with mixed N^O, N^S, N^P chelating ligands for olefin polymerization catalysis Andrea Ravasio, Laura Boggioni and Incoronata Tritto.- 3. Rare-earth metal complexes supported by nitrogen-containing ligands in olefin polymerization Alexander A. Trifonov.- 4. Imine-based Vanadium Catalysts for -olefin Polymerization Carl Redshaw.- 5. Imino- and Amido-Pyridinate d-Block Metal Complexes in Polymerization/Oligomerization Catalysis Giuliano Giambastiani, Lapo Luconi, Roger L. Kuhlman and Phillip D. Hustad