15. A computer-implemented method comprising: as implemented by one or more computing devices configured with specific executable instructions, receiving context information associated with a current context of a user, wherein the context information includes at least one of a current location of the user or a current activity of the user; determining a context attribute associated with the current context of the user based at least in part on the context information; determining a content characteristic that is identified in stored context-to-characteristic association information as being associated with the context attribute, wherein the content characteristic is not the current location of the user and the content characteristic is not the current activity of the user; selecting, by the one or more computing devices, a first portion of a first content item, selected from among a plurality of content items, to be consumed in the current context, wherein selecting the first portion of the first content item is based at least in part on a determination that content association information indicates that the content characteristic that is identified in the stored context-to-characteristic association information as being associated with the context attribute is also associated with the first portion of the first content item; and causing presentation of an option whose selection enables at least the selected first portion of the first content item to be consumed.
16. The computer-implemented method of claim 15 , further comprising causing presentation of an option whose selection enables the user to purchase the first content item that includes the selected first portion.