The Scrolls of Time. Jayne Thorne, CIA Librarian, #6

In this shattering conclusion, CIA Librarian Jayne Thorne faces a god who has brought magic to its knees. Her final battle will require more than courage, more than power-it will demand an impossible choice. After Odin's devastating victory, the magical world lies in ruins. Libraries burn. Grimoires turn to ash. The TCO is devastated. And Jayne Thorne, the librarian who once protected both magic and memory, stands alone among the wreckage-those she loves lost to the Torrent, her lover and her Rogue beyond her reach. As Odin's malevolent power grows and his army of Wraiths tightens its grip on the mortal realm, Jayne's last hope lies in the World Tree, where the Norns weave the threads of destiny.
With her dragon Hayden beside her, Jayne must navigate the Tree's treacherous paths to reach these ancient Fates. Only they can bestow the Time Totem-the power to unravel time itself. But the Norns' trials are legendary, designed to break both body and spirit, and they do not grant their gifts lightly. In THE SCROLLS OF TIME, a cosmic convergence looms that will bind the worlds of magic and mortality forever.
Because this time, being clever isn't enough. Being brave isn't enough. To defeat a god, Jayne Thorne might have to become something else entirely. The series ends here. The legend begins.