7. The computer-implemented method of claim 4 , wherein obtaining the entity data comprises obtaining entity summary data describing an overview of multiple named entities that are referenced by the activated ebook content.
4. The computer-implemented method of claim 1 , wherein the layer that was launched by the client device includes a named entity layer, wherein identifying the layer information comprises: identifying one or more named entities referenced by the activated ebook content identified by the translated position range; and obtaining entity data for the one or more named entities referenced by the activated ebook content identified by the received position range, and wherein the identified layer information includes the obtained entity data for the one or more named entities.