The Afterlife Series Series by Mur Lafferty

Kate and Daniel are reunited, but they have to return to their duties in traveling the afterlife. There are stolen souls suffering without cause in Hell, and only they can help. Kate is back in her corporeal body, but keeping memories of her time as pure soul energy, recently touched by the divine. Daniel carries the magic of an old god and the sword of a death goddess, as well a grudge against the deity who tricked him into losing nearly everything... moreKate and Daniel are reunited, but they have to return to their duties in traveling the afterlife. There are stolen souls suffering without cause in Hell, and only they can help. Kate is back in her corporeal body, but keeping memories of her time as pure soul energy, recently touched by the divine. Daniel carries the magic of an old god and the sword of a death goddess, as well a grudge against the deity who tricked him into losing nearly everything. As they search for the missing souls, Kate and Daniel have to come to terms with themselves and see if their friendship - not to mention the cosmos – can handle everything they've been through thus far. less