The back cover picture shows the structure of a dinuclear organometallic oxime complex, which exhibits metal–ligand bifunctional reactivity upon dissociation to the mononuclear hydrido–oxime complex and coordinatively unsaturated oximato complex. These mononuclear species are easily converted to each other through proton-coupled hydride transfer with alcohols and ketones. Owing to metal–ligand cooperation, the dinuclear complex efficiently catalyzes the transfer hydrogenation of ketones with 2-propanol. Details are discussed in the article by S. Kuwata, T. Ikariya et al. on p. 504 ff.