The Sands of Eternity (Loner Book #8): LitRPG Series

It's time to set off for the lands of the Orcs in search of the fourth sword, but first Falk and his friends have to bring someone back from the dead - another friend, who recently died in the real world. Henceforth, Artyom will become the Emissary of the God of the Dead in Arkatnia, while the virtual God migrates over into the real world.

To make this happen, though, Artyom's girlfriend (who's never played a computer game in her life) will need to search the coffins that fly over the capital until she finds the one that contains a copy of Artyom's character. And then she'll need to bring him back to life.

As if that weren't enough, Katar is under the control of the Spirit of the Hunt Clan, which represents a serious threat both in the virtual world and in the real one.

Long story short, conducting the necessary ritual is most definitely not going to be easy.