1. A system for providing orientation into digital information, comprising: an information configured to maintain a plurality of evergreen indexes for subject areas comprising digital information and which are each organized by topics comprising a topic model matched to the digital information; a guide generator configured to determine a user interest within the digital information; and a topic model matcher configured to evaluate the topic models for the evergreen indexes against the user interest and identifying those topics models that best match the user interest, wherein access to the digital information is provided via at least one of the topic models in at least one of the evergreen indexes.