Last Bastion by Catherine Lievens

The serpent is growing stronger…

Lane has no idea what happened when he opens his eyes after dying. Finding out he’s in the underworld is unexpected and unwelcome, but meeting the Egyptian god of the underworld, Osiris, soothes some of those feelings. Lane doesn’t know where his place is, but he wouldn’t mind if it were by Osiris’s side.
Osiris and the entire Egyptian pantheon are in trouble, so it’s not the best moment for Osiris to start a relationship with one of his dead souls—or maybe it is. Osiris will fight Apophis if he manages to break out of the darkness, and Lane gives him one more reason to stand strong.

The darkness is breaking, and Apophis is growing stronger. Will the gods be enough to stop him from leaving his prison? What will happen if they’re not?