Back is a single comic in EGS:NP. Though it is listed separately on the main dropdown and on the archive page, it serves to conclude the previous arc. Therefore, it doesn't count as a separate story arc (for counting purposes) but as part of the fifteenth one. It only consists of the EGS:NP Comic for 2014-08-01. It one of only 2 double sized comics in EGS:NP (the other being the EGS:NP Comic for 2015-02-23).