Publishing is one of the sectors where with the advance of information technologies there are new possibilities of carrying out traditional processes in a more efficient way. The features provided by the new possibilities are exploited in Electronic Publishing. However, electronic handling does not replace totally the traditional processes (there is still a lot of non-electronic publishing and this will continue existing), but it offers new and interesting possibilities that produce diversification (more than replacement). There are some opinions that, with the increasing connectivity, the intermediaries will disappear and every process (in the electronic world) will be carried out directly from the originator (creator or producer) to the consumer (user or buyer). But there is still a need for intermediary systems to facilitate access to the right information and services. This need increases as the information available and accessible also increases. This paper presents the design and implementation of a specific intermediary system, an electronic broker, that facilitates electronic commerce in the electronic publishing market. An electronic broker for electronic commerce can provide users with products and services that are produced by several suppliers. When the goods being handled consist of electronic information, the broker can also be used to deliver the results. This paper presents the concepts of electronic brokerage in general, but emphasises those aspects more related to electronic publishing, such as the selection of products (images, magazines, videos, etc.) and services (document translation, professional layout, multimedia courses, off-line video production, etc.).