The phrase refers to a hypothetical continuation of a well known fantasy saga. The preliminary sequence concluded with e book 14; thus, ‘e book 15’ signifies a possible, and at present nonexistent, extension to the unique narrative. Dialogue round this idea typically includes fan hypothesis, approved sequels, or doable spin-offs.
The importance lies within the enduring reputation and the wealthy universe established by the creator. The potential of additional exploration of that universe generates appreciable curiosity. Moreover, the hypothetical continuation carries the good thing about offering further narratives and characters for devoted readers to get pleasure from, increasing the established lore and doubtlessly introducing new themes or views.