1. A system comprising: one or more processors; a memory; and computer-executable instructions stored on a computer readable medium, the instructions readable by the one or more processors, the instructions, when read and executed, causing the one or more processors to: store content graph information regarding individual items of content accessed by one or more users of the system; store path graph information comprising the order in which each of the one or more users accessed individual items of content; and select individual items of content to be presented to a subsequent user of the system and an order in which such individual items of content are presented to the subsequent user based on the stored content graph information and the stored path graph information.