The potential commercial uses of some compounds as catalysts has generated much research interest. Metal-metal bonded dimers and clusters are an example of these. This concise basic approach to the subject covers among other topics: structure of metal-metal bonded dimers and clusters including both small and large clusters, synthesis of reprensentative dimers and clusters, and localized bonding schemes and their limitations. Highly illustrated, with a relatively basic text that includes problems, this addition to the Oxford Chemistry Primers series will be valuable to the advanced chemistry undergraduate.